In 2009, President Barack Obama ended the Central Intelligence Agency’s controversial program of interrogation and detention of 9/11 terror suspects. In that same year, the Senate voted to begin a lengthy investigation of the program with the goal of issuing a report to the American public. On Tuesday, the chairman of the Intelligence Committee took to the floor of the Senate and accused the CIA of secretly removing documents and searching Senate staff computers in an effort to undermine the investigation. The CIA director denied the allegations, insisting the agency had done nothing wrong. New debate over congressional oversight of clandestine operations.