In 1970, he was plucked from Saigon to attend West Point. He got his degree and went home to fight, but instead spent six years in a reeducation camp. Then, somehow, he ended up teaching high school in D.C.

On former CIA agent John T. Downey, who spent more than 20 years in China as the longest held American captive of war.

The story of Bowe Bergdahl, a soldier who walked off his base in Afghanistan only to be captured by the Taliban.