America's Book of Secrets S02E11 - Lost Treasures

American treasure hunters are convinced that there are missing fortunes just waiting to be discovered all around the country. But is it a harmless hobby, or do treasure hunters find themselves locked in a battle with other searchers--or even the government? We'll investigate the deepest mysteries of missing millions. From secret stashes of Confederate gold bullion, to silver coins and antique weapons, treasure hunters are scouring the country for hidden clues that might lead them to untold riches. How do they decode encrypted treasure maps? In 1971, $200,000 went missing in America's only unsolved airplane hijacking. Can following the money help to uncover the true identity of mysterious hijacker D.B. Cooper? Could secret agreements with criminal art dealers help the FBI to solve America's biggest art heist? Is it possible that even our country's history is under threat from thieves and crooks?