Air Force leaders ousted in historic shake-up

Gates announced at a Pentagon news conference that he had accepted the resignations of Air Force Chief of Staff Gen. Michael Moseley and Air Force Secretary Michael Wynne - a highly unusual double firing.

Gates cited two embarrassing incidents in the past year. In one, a B-52 bomber was mistakenly armed with six nuclear-tipped cruise missiles and flown across the country without anyone realizing nuclear weapons were aboard.

In the other, four electrical fuses for ballistic missile warheads were mistakenly sent to Taiwan in the place of helicopter batteries. Gates said an internal investigation found a common theme in the B-52 and Taiwan incidents: "a decline in the Air Force's nuclear mission focus and performance."