I have been through SERE, been waterboarded. was it fun? no. do I wake up at night needing counseling? no. I knew they were not going to kill me, although the feeling of involuntary panic from the procedure is indescribeable. The insurgents also know we are not going to kill them during interegation, so something that brings on an uncontrollable panic and willingness to cooperate to make that s**t stop is a useful tool. No one is immune to it's effects. It is not torture, but it will make you talk......