Lewis "Scooter" Libby, former chief of staff to U.S. Vice President Dick Cheney, exits a car as he arrives for the second day of his perjury trial at a federal courthouse in Washington, January 24, 2007. Libby is charged with lying to investigators during a probe to determine who leaked the classified identity of CIA operative Valerie Plame, whose husband, former ambassador Joseph Wilson, publicly criticized the Bush administration's use of intelligence in the run-up to the invasion of Iraq. REUTERS/Jonathan Ernst (UNITED STATES)