Question: John Choon Yoo (born July 10, 1967) is a Korean-American attorney, law professor, and author, his best known for his opinions concerning the Geneva Conventions that attempted to legitimize the War on Terror by the United States,  is a metaphor of war referring to the international military campaign that was launched by the U.S. government after the September 11 attacks in the U.S. in what year?
Sentence (from "John Yoo"): He also authored the so-called Torture Memos, which concerned the use of what the Central Intelligence Agency called enhanced interrogation techniques including waterboarding.
Relevant evidence: No