In 1978, Cambodian artist Vann Nath was imprisoned by the Khmer Rouge. Turned out, his artistic ability was what kept him alive: out of 14,000 people who was imprisoned, Vann was only one of 7 to leave alive.
After prison, Vann painted his experience for Cambodia's Museum of Genocide, including scenes of tortures done on suspected enemies.
The photo to the left shows one of his paintings hanging above the very instrument/procedure that had recently swirled in controversy (is it torture or a valid interrogation technique?): waterboarding.