The Oklahoma City experiments were partly to blame for weakening the FAA's authority in sonic boom issues. After the tests, President Lyndon B. Johnson's presidential advisory committee transferred matters of policy from the FAA to the National Academy of Science. Secretary of the Interior Stewart Udall complained that the NAS did not include one environmental preservationist, and pointed out that although the Oklahoma City tests were stacked in favor of the SST, they were still extremely negative. Indeed, by 1966, national grassroots campaigns against sonic booms were beginning to affect public policy.