Hindenburg Artifact - A Hoboken, New Jersey, man has a palm-sized, army-green metal box that looks like an instrument panel. Beneath a shattered plastic covering is a sliding, numbered scale; knobs on each end move a lever across the scale. German writing indicates the country of origin. Might this instrument have been recovered from the crash site of the Hindenburg in Lakehurst, New Jersey? Family lore says that a distant relative was among the many bystanders plucking souvenirs from the wreckage of the terrifying disaster. Chemicals from the fire or balloon envelope gas would have evaporated 10 minutes after the explosion, but the broken plastic can be tested for age and heat distress with forensic analysis of the instrument. HISTORY DETECTIVES host Elyse Luray travels to Atlanta and the New Jersey landing site of the ill-fated zeppelin to determine if the instrument panel is in fact from the horrifying crash. Bonus Army Stamp - A collector in Hawaii has a postage-sized stamp with an illustration of a World War I "doughboy" solider and the words "PAY THE BONUS." The contributor, whose grandfather was a World War I soldier, thinks the stamp is linked to the "Bonus Army" veterans. A bill was passed in 1924 promising WWI veterans a payment 21 years later - dubbed a "bonus" - in 1945. When the Great Depression hit, veterans organized to demand early payment of the bonus. They organized a protest march on Washington in 1932, demanding pay for their combat, and approximately 20,000 veterans camped out near the Capitol following the march. Weeks went by until Herbert Hoover ordered General Douglas McArthur to force the vets out. Two veterans were shot and killed; thousands were tear-gassed. What role did this political stamp play in the veterans' movement? HISTORY DETECTIVES host Wes Cowan heads to Hyde Park, New York, and Washington, DC, to reveal the stamp's connection to the veterans' struggle. Dempsey Fight Bell - July 4, 1919, marks the day America found its true calling in a national obsession. Icon Jack Dempsey became the world's first boxing superstar, and he did it with the clang of a bell. Now, a contributor in Reno, Nevada, wants to know: Is the bell he's toasted many a night on the wall of his favorite bar the one that was ringside at Dempsey's legendary world heavyweight championship match? The question goes beyond a single fight. Dempsey's bout ushered in the Roaring 20s, America's fascination with celebrity and the golden age of championship sports. Tukufu Zuberi leads the HISTORY DETECTIVES to weigh in on the case in Reno, Nevada, and New York City, sorting truth from myth to determine which clues ring true.