Some of this controversy may also be traced, at least in part, to the abrupt manner in which McPeak had replaced General Michael Dugan as Chief of Staff of the Air Force. General Dugan, a popular and well-intentioned officer, had sought to repair the Air Force's image, badly frayed by the service's withholding of embarrassing information about the performance of the F-117 Nighthawk during the invasion of Panama. Dugan had also sought to make top Air Force officials more accessible, but he was relieved of command by then-Secretary of Defense Dick Cheney shortly before the start of Operation Desert Storm and the first Gulf War following some intemperate remarks Dugan had made to the news media about targeting Iraqi leader Saddam Hussein under United Nations Security Council Resolution 666 prior to the start of hostilities, this despite the fact that as Air Force Chief of Staff, Dugan had no command authority within the U.S. Central Command theater of operations. In short order, Cheney quickly replaced Dugan with McPeak as Chief of Staff, although Dugan was retained as a 4-star special advisor by the Secretary of Defense until his retirement from the Air Force.