Drafting of the manual reflected concerns about enhanced interrogation techniques and/or torture, such as water boarding, that followed after a 2003 memo by John Yoo determined that the wartime authority of the U.S. president overrode international agreements against torture. Revision of the manual from the previous FM 34-52 Intelligence Interrogation followed passage of a law in 2005, pressed by Senator John McCain, that caused interrogation techniques not included in the manual to be considered illegal for the U.S. Army, but not for the CIA. Therefore, the release of the manual was seen to prohibit Army personnel from methods such as mock executions, sexual humiliation, hooding prisoners and "waterboarding". On March 8, 2008 president George W. Bush vetoed a bill, supported by Democrats