They called him “The Stupid” - and that was exactly what he wanted When Navy sailor Douglas Hegdahl was captured during the Vietnam War and thrown into the infamous Hanoi Hilton prison camp, he made a decision that would save hundreds of lives. He would play dumb. Hegdahl acted confused, clumsy, harmless. His captors laughed at him. They gave him freedom to wander because they thought he was too simple to be a threat. READ ALSO: 19 feared dead as military plane crashes in residential area They were catastrophically wrong. While pretending to stumble around,...