A historic plaque commemorates Alex Haley's epic slave history "Roots"; FBI agents search for criminals trying to sell North Carolina's original copy of the Bill of Rights; a ring worn by Lee Harvey Oswald the morning that JFK was assassinated.

Among the missing: historic Moon Tapes that hold the clearest footage from the Apollo 11 moon landing. Then, President Lincoln's brilliantly written Bixby Letter that inspired the movie Saving Private Ryan is missing. Plus: the daring heist of George Washington's false teeth from the Smithsonian Museum.

Among the missing: the White House cornerstone, the very first piece of the White House, laid by the secretive Freemasons. Then, letters from an American soldier in Vietnam--pilfered for enemy propaganda. Plus: a lost gun might be the key to solving the infamous Amityville murders.

Host Brad Meltzer recruits help to find rare and historic footage from D-Day, shot behind enemy lines. FDR's inaugural address is stolen from the National Archives, and the distressing tale of George Harrison's guitar.