Danner says the CIA interrogators tried to keep Zubaida constantly awake for the three weeks he was strapped to the chair, spraying water in his face if he fell asleep.

VOA: standard.2009.03.23

His thoughts and fears keep him awake at night.

VOA: standard.2010.05.04

The interrogators were told they could put them in painful standing positions, deprive them of solid food, keep them awake for extended periods of time, lock them in cold rooms, and submit them to the technique of simulated drowning known as waterboarding.

VOA: standard.2009.04.17