Waterboarding is an interrogation technique that simulates drowning by causing a suspect's lungs to fill up with water. Is it torture? Is it illegal? Michael Mukasey won't answer those questions and that could prevent his confirmation as Attorney General. At the conservative Heritage Foundation today, President Bush defended his nominee, saying the Senate is asking questions that are "unfair." He said Mukasey does not know the answers about waterboarding, because he has not been briefed on classified programs. Dan Eggen is Justice Department reporter for the Washington Post.