The Senate Armed Services Committee begins a probe into allegations that the U.S. Air Force made thousands of secret B-52 raids into Cambodia in 1969 and 1970 at a time when the United States recognized the neutrality of the Prince Norodom Sihanouk regime in Cambodia. The Pentagon acknowledged that President Richard Nixon and Secretary of Defense Melvin Laird had authorized the raids against Cambodia, but Sihanouk denied the State Department claim that he had requested or authorized the bombing. Though it was established that the bombing records had been falsified, Laird and Henry Kissinger, Nixon’s National Security Advisor, denied any knowledge of the falsification. The Senate hearings eventually exposed the extent of the secrecy involved in the bombing campaign and seriously damaged the credibility of the Nixon administration.