WWII Diary: Does this diary hold the key to understanding the fate of a missing bomber pilot from World War II? Annie Oakley Coin: Was this coin a target for one of the Wild West's most popular female sharpshooters? 1856 Mormon Tale: Is this tattered book a true account of female slavery in the old West?

Red Hand Flag: Is this peculiar flag one that African-American soldiers marched under in the war to end all wars? Seth Eastman Painting: Is this painting an original depiction of Native American life from one of the premiere painters of the American West? Isleton Tong: Was this building a safe haven for persecuted immigrants, or a hub for organized crime?

Japanese Balloon Bomb: Is this scrap of fabric evidence of a secret wartime attack on the United States' mainland? Society Circus Program: Why are some of New York's wealthiest planning a high society circus at the very depth of the Great Depression? Camp David Letter: Could a box found in a dumpster hold information about the founding of a top-secret Presidential retreat?

China Marine Jacket: Can the symbols on this unusual item of clothing identify a marine who may have witnessed a Chinese paradise tumbling into disaster? Airstream Caravan: Was this mobile home part of a modern-day wagon train halfway across the world? Lincoln Forgery: Could this piece of sheet music have come from Abraham Lincoln's private collection?

Hindenburg Artifact Was this device snatched from the burning wreckage of the ill-fated zeppelin? Bonus Army Stamp: Is this stamp connected to a moment when the U.S. Army advanced with fixed bayonets against fellow soldiers in the nation’s capital? Dempsey Fight Bell: Is this the bell that sat ringside at the world's first boxing superstar's legendary match?

GAR Photograph: How did two African Americans come to be part of this photograph of about 20 older white men in Reconstructionist-era America? Bill Pickett Saddle: Did this saddle ride into cowboy history with one of rodeo's most daring innovators? Hitler Films: Could these rusting film canisters contain unknown footage of one of the 20th century's most heinous murderers?

Black Tom Shell: Is this shell from a devastating act of foreign sabotage on American soil? USS Olympia Glass: Could this farmhouse door have sailed into battle in one of the country's greatest naval victories? Front Street Blockhouse: Did this unassuming house once protect an American colony from attack almost 300 years ago?

John Adams Book: Do these tattered pages open the book on a President who built a nation even as his own son fell into ruin? Mankato Spoon: What does this delicate silver spoon have to do with the largest mass execution in American history? NC-4: First Across the Atlantic: Is this piece of fabric a remnant from the first transatlantic flight, eight years before Lindbergh?

Shipwreck Cannons: Are these the last remains of a navy schooner that fought in a border dispute with the mighty British Empire? Connecticut Farmhouse: How is this Connecticut farmhouse connected to the assassination of a Russian tsar? Kahlil Gibran Painting: Is this painting an unknown work by an immigrant poet whose words inspired an American generation?

Blueprint Special: Did this record play a dramatic role in the Allied victory during the Second World War? Monroe Letter: Does this letter link America's fifth President to the high seas piracy of U.S. merchant ships in the early 1800s? Atocha Spanish Silver: What is the meaning of these markings on a silver bar discovered in the wreck of the Spanish ship?

Slave Songbook - Are these tattered pages the earliest record of music created by slaves? Josh White Guitar - What role did this guitar play in the transformation of the music industry in the 1960's? Birthplace of Hip Hop - Did this Bronx apartment building give birth to a culture that now spans the globe?