Navy Cmdr. Robert J. Flynn, who...

John Downey and Richard Fecteau

...spent five and a half years in a Communist Chinese prison during the Vietnam War, almost always in solitary confinement, after he was shot down on a bombing mission, died at age 76.

Five and a half years! Wow. But his obit in the Times also mentions:

Two C.I.A. agents, John Downey and Richard Fecteau, who had been captured in China in 1952 during the Korean War, were also at the prison where Lieutenant Flynn and Major Smith were held. Mr. Fecteau was freed in December 1971, and Mr. Downey in March 1973.

Whoa! These two guys were in a Chinese prison camp for twenty years? That's amazing.