Domingo Rosas, an ex-Army sergeant who served in Iraq from April, 2003 to 2004, describes mistreatment of detainees at a site called Tiger Base on the Syrian border. They were crowded into a shipping container, and part of his job was to keep them from sleeping. Later, the site was taken over and rebuilt by men from another (unnamed) government agency. One day he delivered a message there, and when he opened the door, he saw a prisoner being rolled around in the mud while water was poured over his face—a version of waterboarding.