Scientists Just Created 3D Digital Replicas of John F. Kennedy’s Assassination Bullets

NIST
NIST

Part of the National Archives and Record Administration’s duty is to provide the public with access to its billions of pages of texts, maps, photos, film, and other artifacts of American history—but some of them aren’t so easy to view. The bullets from John F. Kennedy's assassination, for example, have long been considered too fragile for anything but sitting in a climate-controlled vault in Washington, D.C.

However, they recently took a field trip to the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, where the ballistics team there used advanced microscopic imaging techniques to create breathtakingly accurate 3D digital replicas.

jfk bullet 3D replica
NIST

According to a press release from NIST, the collection includes two fragments from the bullet that killed Kennedy, the so-called “stretcher bullet” that hit both Kennedy and then-governor of Texas, John Connally; two bullets from a test-fire of the assassin's rifle, and a bullet from an earlier unsuccessful assassination attempt on Army Major General Edwin Walker that might have come from the same rifle.

As you can probably imagine, the two fragments from Kennedy’s fatal bullet are the most affecting pieces of the collection. They also give you a pretty good understanding of how difficult it must have been to recreate them—the bits of metal are twisted into gnarled, asymmetrical shapes that look different from every angle.

jfk bullet 3D replicas
NIST

To replicate each miniscule mark, ridge, and divot, NIST physical scientists Thomas Brian Renegar and Mike Stocker spent hours rotating the artifacts beneath the microscope, capturing images from all perspectives, and then combining parts of the images to create full 3D versions of them.

“It was like solving a super-complicated 3D puzzle,” Renegar said in the release. “I’ve stared at them so much I can draw them from memory.”

Kennedy’s assassination on November 22, 1963, has generated no small number of conspiracy theories over the years, but NIST and the National Archives made it clear that the project to replicate the bullets was “strictly a matter of historic preservation,” and not in any way a reopening of the case. But once the complete 3D scans are made available in the National Archives’ online catalog in early 2020, members of the public are free to analyze them however they like.

“The virtual artifacts are as close as possible to the real things,” Martha Murphy, the National Archives’ deputy director of government information services, said in the release. “In some respects, they are better than the originals in that you can zoom in to see microscopic details.”

And while Kennedy’s case is closed, the cutting-edge technology used on his bullets will be used in the future.

“The techniques we developed to image those artifacts will be useful in criminal cases that involve similarly challenging evidence,” NIST forensic firearms expert Robert Thompson said in the release.

7 Massage Guns That Are on Sale Right Now

Jawku/Actigun
Jawku/Actigun

Outdoor exercise is a big focus leading into summer, but as you begin to really tone and strengthen your muscles, you might notice some tough knots and soreness that you just can’t kick. Enter the post-workout massage gun—these bad boys are like having a deep-tissue masseuse by your side whenever you want. If you're looking to pick one up for yourself, check out these brands while they’re on sale.

1. Actigun 2.0: Percussion Massager (Black); $128 (57 percent off)

Actigun massage gun.
Actigun

Don't assume you need a professional masseur to provide relief—this massage gun offers 20 variable speeds and can adjust the output power on its own according to pressure. Can your human massage therapist do that?

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2. JAWKU Muscle Blaster V2 Cordless Percussion Massage Gun; $260 (13 percent off)

Jawku massaging gun.
Jawku

This cordless, five-speed massager uses a design that's aimed to increase blood flow, release stored lactic acid, and relieve sore muscles through various vibrations.

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3. DEEP4s: Percussive Therapy Massage Gun for Athletes; $230 (23 percent off)

Re-Athlete massage gun.
Re-Athlete

Instant relief is an option with this massage tool, featuring five different attachments made to tackle any muscle group. You can squeeze in eight hours of massage time before you have to charge it again.

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4. Handheld Massage Gun for Deep Tissue Percussion; $75 (15 percent off)

Massage gun from Stackcommerce.
Stackcommerce

With five replaceable heads and six speed settings, this massage gun can easily adapt to the location and intensity of your soreness. And since it lasts up to three hours per charge, you won't have to worry about constantly plugging it in.

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5. The Backmate Power Massager; $120 (19 percent off)

Backmate massage gun.
Backmate

Speed is the name of the game here. The Backmate Power Massager is designed for fast, effective relief through its ergonomic design. Fast doesn’t need to mean short, either. After the instant relief, you can stimulate and distract your nervous system for lasting pain relief.

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6. ZTECH Percussion Massage Gun (Red); $80 (46 percent off)

ZTech massage gun.
ZTech

This massage gun looks a lot like a power drill, and, similarly, you can adjust its design for the perfect fit with six interchangeable heads that target different muscle areas.

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7. Aduro Sport Elite Recovery Massage Gun (Maroon); $80 (60 percent off)

Aduro massage gun.
Aduro

Tackle large muscle groups, the neck, Achilles tendon, joints, and small muscle areas with this single massage gun. Four massage heads and six intensity levels allow this tool to provide a highly customizable experience.

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This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links. If you haven't received your voucher or have a question about your order, contact the Mental Floss shop here.


50 Surprising Facts About America's Founding Fathers

Hulton Archive/National Archive/Getty Images
Hulton Archive/National Archive/Getty Images

George Washington. Alexander Hamilton. Benjamin Franklin. John Adams. These men and several more continue to stand as some of the most influential figures of the United States of America, drafting the Declaration of Independence and helping to define the ideology and ambition of the free world.

More than 200 years later, their philosophies continue to inform, educate, and inspire. If you're aware of their significance but might be a little short on details, we've assembled a laundry list of facts, trivia, and lesser-known information about this formidable group.

1. The Founding Fathers probably never heard the phrase "Founding Fathers."

Tight shot of the famous signature of John Hancock on the Declaration of Independence that was signed on July 4th, 1776.
smartstock/iStock via Getty Images

The term wasn't coined until 1916, when then-Senator Warren G. Harding was giving a speech at the Republican National Convention. Harding's phrase included men who fought in the American Revolution and drafted the Constitution as well as the Declaration of Independence.

2. John Hancock has become synonymous with personal signatures.

The most likely reason: His name takes up six square inches on the Declaration of Independence, a massive piece of real estate compared to the rest of the signees. Sam Adams, for example, needed just 0.6 square inches. No one knows for sure why Hancock used such broad strokes, although it's possible he didn't realize the document would eventually need 56 signatures.

3. The signatures on the Declaration of Independence were kept secret.

Not too many people could crack jokes at Hancock's expense over it because the signatures were kept secret for some time owing to the fact that there was fear of reprisal from the British. At the time the Declaration was signed, British armies were stationed nearby, and the potential to be hung for treason was large enough to keep quiet about it.

4. John Hancock was more famous for being a smuggler.

John Hancock
Wikimedia Commons // Public Domain

Hancock often brought over goods like glass, paper, and tea in secret to avoid excessive British taxation.

5. The British had a price on John Hancock's head.

Hancock's smuggling practices led to the British wishing to see his head mounted on the proverbial stake. Hancock was actually said to be a little irate about that British resentment. He thought the 500 British pound price on his head was insultingly low.

6. Thomas Jefferson was given the job of writing a rough draft of the DECLARATION Of Independence.

Washington D.C. The Jefferson Memorial, a presidential memorial dedicated to Thomas Jefferson, 3rd President of the United States and one of the most important of the American Founding Fathers
Joaquin Ossorio-Castillo iStock via Getty Images

Such semantics probably weren’t on Thomas Jefferson’s mind when he prepared the Declaration. Considered the best writer of the group, it was Jefferson who was charged with writing a rough draft of the document.

7. Thomas Jefferson's initial draft of the Declaration of Independence called for an end to slavery.

Jefferson later took this part out because he felt the document wouldn’t be approved by delegates in states like Virginia and South Carolina.

8. Thomas Jefferson kept bears as pets (for a short time).

A pair of grizzly bears
JEAN-FRANCOIS MONIER, AFP/GETTY IMAGES

Jefferson can also lay claim to having the most unusual "pets" of any president on White House grounds. A military captain gifted Jefferson with two grizzly bears in 1807. Jefferson knew the animals were too ferocious to be kept, but until he could pass them over to a handler in Philadelphia, they remained on the grounds for two months. Jefferson kept them caged on the front lawn.

9. Thomas Jefferson also had mastodon bones.

Those bears weren't Jefferson's only experiment with imposing creatures. He once had the bones of a mastodon sent to him in the White House and devoted time to an attempt to reconstruct it. He was actually a bit obsessed with mastodons.

10. Thomas Jefferson told a slave he would free him if he learned French cooking.

Just before Jefferson was appointed minister to France in 1785, he took a trip to the country and quickly fell in love with its cuisine. In a rather cringe-inducing deal, he told his slave, James Hemings, that he would free him if Hemings would learn the art of French cooking and then pass it on to a Jefferson employee. Jefferson kept his word, although Hemings stayed in France for several years and didn't become a free man in the U.S. until 1796.

11. Thomas Jefferson was a prolific writer.

Jefferson liked to write nearly as much as he liked to eat. The third president wrote an estimated 19,000 letters in his lifetime, keeping a copy of each correspondence for himself. Oddly, he never wrote to his wife.

12. Thomas Jefferson frequently wrote to Abigail Adams.


Wikimedia Commons // Public Domain

After Jefferson became minister to France, he maintained a close relationship with both John Adams and John's wife, Abigail. Despite gender equality being a rare concept at the time, Jefferson thought Abigail to be every bit as insightful as anyone and kept a lengthy mail correspondence with her.

13. John Adams wasn't a fan of the vice presidency.

John Adams became vice president in 1789 with Washington's appointment as commander-in-chief, but the role seemed to insult him. Adams called it the "most insignificant office that ever the invention of man contrived."

14. John Adams was a fan of William Shakespeare.

An illustration of John Adams at a writing desk
Hulton Archive/Getty Images

When he wasn't condemning his own job, Adams was an ardent admirer of William Shakespeare. With Thomas Jefferson, Adams even visited Shakespeare's home in Stratford-upon-Avon in 1786. Adams liked it; Jefferson thought they were overcharged for the tour.

15. John Adams brought Satan to the White House.

When Adams took the presidential office in 1797, he brought with him two dogs: One was Juno, and the other was named Satan.

16. John Adams was the first president to live in the White House.

The White House in Washington DC - official residence of the President of the United States of America.
lucky-photographer iStock via Getty Images

Adams was the first president to take up occupancy in the White House, but construction delays kept him off-premises until 1800; he was in office only five more months after moving in. That also means Juno and Satan were the first dogs to live in the White House.

17. John Adams wanted the presidency to keep some of the splendor of royalty.

Adams's lost bid for reelection may have had something to do with his somewhat pompous view of the office. He often lobbied for the president to be referred to as "his highness."

18. John Adams created the United States Marine Band.

Adams couldn't have been too much of a miser, though. In 1798, he formed the United States Marine Band, the oldest active professional music group in the country.

19. John Adams and Thomas Jefferson died on the same day. And it gets weirder.

sparklers in front of an American flag
nu1983/iStock via Getty Images Plus

In a strange bit of coincidence, John Adams and Thomas Jefferson died the same day: July 4, 1826. It was also the 50th anniversary of American independence.

20. Benjamin Franklin didn't believe in free will.

While all of the Founding Fathers are renowned for pushing the idea of liberty and independent choice, Benjamin Franklin apparently came to the idea a little late. In 1725, when he was just 19 years old, Franklin self-published a pamphlet titled A Dissertation Upon Liberty and Necessity, Pleasure and Pain, which argued that humans didn't actually have free will and weren’t responsible for their behavior. Maturity prevailed, however, and Franklin later burned almost every copy of the booklet he could find.

21. Benjamin Franklin wanted to rearrange the alphabet.

Ben Franklin's eccentricity wasn't limited to that strange philosophy. He once had a plan to rearrange the English alphabet by eliminating the letters C, J, Q, W, X, and Y, declaring them redundant. It didn't katch on.

22. If you're reading this while watching a sunrise, you might have Ben Franklin to thank.

A more reasonable Franklin contribution: bifocals, which he invented in order to both see from a distance and read text up close without having to switch lenses.

23. Ben Franklin didn't think very highly of the bald eagle.

A close-up of a bald eagle's head.
photosvit/iStock via Getty Images

Continuing his role as America’s most eccentric Father, Franklin also advocated for the turkey to be the nation's official bird. He once dissed the bald eagle, calling it a bird "of bad moral character."

24. Ben Franklin (sarcastically) thought highly of flatulence.

Franklin also authored a text titled "Fart Proudly," a mocking essay intended to irritate the Royal Academy of Brussels, an institution he felt was too focused on impractical science. In it, he advocated for a breakthrough in making toots more pleasant-smelling. (He never sent it.)

25. Ben Franklin bathed without water.

Franklin's unique perspective extended to personal hygiene. He often opted for what he dubbed an "air bath" over a cold water bath, wandering around nude in his quarters for a half-hour each morning while reading or writing.

26. John Adams and Ben Franklin once argued about a window.

Liberty Bell and Independence Hall in Philadelphia
rabbit75_ist iStock via Getty Images

Franklin and John Adams made for a bit of an odd couple. Forced to spend the night together in a hotel while traveling in 1776, the two argued over whether the window should be open or closed. Adams believed night air could lead to colds; Franklin, obviously fond of a little breeze, dismissed the notion as nonsense and advocated for fresh air. (Franklin won: The window stayed open.)

27. Most of Philadelphia came to Ben Franklin's funeral.

When Franklin died in 1790, roughly 20,000 people attended his funeral—two-thirds of Philadelphia’s population at the time.

28. Ben Franklin and George Washington both had big egos.

Franklin was told by friends early in his life that he should start to consider humility a virtue, while Washington reportedly had to corral his predilection for arrogance.

29. George Washington's famous hairdo wasn't a wig.

George Washington and his generals
kreicher/iStock via Getty Images

While Washington may have curbed his ego, he still made time to look good. His famous white 'do was not a wig, but his actual hair, powdered white and carefully styled each morning.

30. George Washington had a tree-shaking temper.

While he looks out at you from the $1 bill with total calm, Washington could unleash a hellacious temper if you caught him on the wrong day. Leading the Battle of Monmouth in 1778, Washington used so much profanity that General Charles Scott, who witnessed the event, said he cussed "until leaves shook on the trees … never have I enjoyed such swearing before or since."

31. George Washington helped ensure the presidency would be a short-term gig.

Later in life, Washington's newfound modesty helped usher in a significant principle of the U.S. presidency. Despite the public's desire for him to run for a third presidential term—which he would've won with ease—Washington elected to leave after two terms so he could resume being a regular citizen, avoiding the kind of long-term rule associated with monarchs.

32. George Washington gave up the presidency to make whiskey.

Once he returned to private life in 1797, Washington opened a whiskey distillery at Mount Vernon, which quickly became the largest whiskey distillery in America.

33. George Washington wasn't optimistic the Constitution would last.

Close-up of the Constitution.
jaflippo/iStock via Getty Images

Before taking on the presidency, Washington was wrapped up in the Constitutional Convention, a gathering of minds intended to elaborate on the famous document that would provide concise guidelines for future lawmakers. But Washington was unsure whether it would have any lasting impact. Walking with a friend just before the convention came to a close in 1787, he said, "I do not expect the Constitution to last for more than 20 years."

34. George Washington suffered from a host of medical problems.

In fact, it was Washington himself who didn't last that long. Plagued by a series of ailments including malaria, smallpox, tuberculosis, and diphtheria, the Founding Father died in 1799 at age 67. Suffering from a severe sore throat, he asked doctors to bleed him. They did, with five pints being removed from his body in a single day.

35. Alexander Hamilton begged George Washington to let him fight.

Ink drawings of Alexander Hamilton and Thomas Jefferson on either side of George Washington.
Campwillowlake iStock via Getty Images

Washington's onetime assistant, Alexander Hamilton, had a heartier constitution. Relegated to writing Washington’s letters, Hamilton pleaded with the then-general to let him see some action on the battlefield. Hamilton faced the British in the Battle of Yorktown in 1781 and came away with a victory.

36. Alexander Hamilton was the subject of the country's first political sex scandal.

Alexander Hamilton’s health was also robust enough to carry on an affair with a married woman, Maria Reynolds, while serving as U.S. treasury secretary in 1791. When her husband threatened to go public with the scandal, Hamilton wrote and circulated a pamphlet detailing his side of the story. The Reynolds Affair became the country's first major political sex scandal.

37. The Reynolds Affair was wrapped up by Alexander Hamilton's nemesis.

In an odd footnote, when Maria Reynolds later sued her husband for divorce, her lawyer was Aaron Burr.

38. Alexander Hamilton launched the Coast Guard.

Portrait of Alexander Hamilton on the $10 bill
Professor25/iStock via Getty Images

Beyond setting up the country's banking and financial systems, Alexander Hamilton was also concerned with protecting America’s coastlines. To help suffocate smuggling and enforce tariff laws, Hamilton organized a marine service; it later became known as the United States Coast Guard.

39. Alexander Hamilton's son died in a duel defending his father's good name.

Dueling was part of the Hamilton family long before Alexander's fateful encounter with Aaron Burr. Three years prior, Hamilton's son Philip challenged a lawyer named George Eacker to a pistol fight after Eacker was overheard criticizing his father. Eacker shot Philip, who died the next day.

40. Alexander Hamilton probably acted as a lawyer in the country's first murder trial.

In 1799, Hamilton's life gained one of its most interesting footnotes. As a practicing lawyer in New York, Hamilton teamed with future dueling foe Aaron Burr in what is believed to be the United States' first murder trial on record. After the body of Elma Sands was discovered, a grand jury indicted her boyfriend, Levi Weeks, for the crime. The wealthy Weeks enlisted Hamilton, Burr, and Henry Livingston for his defense. He was acquitted, though public opinion largely declared him guilty.

41. Alexander Hamilton also founded a newspaper.

Hamilton founded another cultural touchstone—the New York Post—in 1801. Then titled the New York Evening Post, it’s one of the longest continually published newspapers in the U.S. When he felt like opining, Hamilton would dictate articles to editor William Coleman.

42. The Federalist Papers went a long way in shifting public opinion on independence.

Hamilton, however, had used his own hand to author the Federalist Papers, a series of essays sent to newspapers in the 1780s to rally support for ratifying the Constitution. Hamilton used the pseudonym Publius, collaborating with James Madison and John Jay.

43. James Madison and Alexander Hamilton hated each other.

There was little love lost between treasury secretary Hamilton and fourth president James Madison, who frequently sparred with over economic strategy. Onetime friends, their acrimony set the tone for Madison’s tenure in office.

44. James Madison's wife was a celebrated hostess.

Said to be shy and reserved, Madison apparently had a counterbalance in wife Dolley, who entertained the whole of Washington. At the time, the city was not exactly a hotbed of partying, and her lavish affairs helped endear congressional members to the idea of Madison as president.

45. James Madison is our tiniest president.

To date, Madison remains our smallest president at 5 feet, 4 inches and 100 pounds.

46. There's a $5000 bill with James Madison's face on it.

James Madison's portrait on US money.
johan10/iStock via Getty Images

Madison is also the president to grace the little-known $5000 bill, part of a series of high-value denominations printed between 1928 and 1945. The bills were mainly used to settle large transactions between banks.

47. Another vice president's wife wrote a book on James Madison.

Although Madison had two vice presidents die in office, he had better luck with future VP Dick Cheney: The former vice president’s wife, Lynne, wrote a well-received biography of Madison in 2014.

48. Sam Adams was a child prodigy.

An illustration of Sam Adams
stocksnapper/iStock via Getty Images

While all of the Fathers had formidable intellects, Sam Adams had quite an early start. He was admitted into Harvard College at age 14 and earned a bachelor’s degree in 1740.

49. Sam Adams wasn't exactly a brewer.

In terms of Founding Father extracurricular activities, Sam Adams is frequently credited with being a beer brewer. That's not really true, though. Adams' father did make malted barley that was sold to breweries, and his son inherited the business and became known as a "maltster." But politics soon dominated Adams' time, and the business fell by the wayside.

50. You can drink at a pub where the Founding Fathers hung out.

Adams may not have been a brewmaster, but like a lot of Founding Fathers, he didn't mind pulling up a chair at a pub. You can enjoy a beer at the same location as Founding Fathers Paul Revere, John Hancock, and Adams. The Green Dragon Tavern in Boston is said to have been the preferred watering hole of the men—a place where politics could be discussed without the hassle of sobriety.