"The Taiwan incident clearly was the trigger," Gates said when asked whether Moseley and Wynne would have retained their positions in the absence of the mistaken shipment of fuses. He also said that Donald found a "lack of effective Air Force leadership oversight" of its nuclear mission.

The investigation found a declining trend in Air Force nuclear expertise – not the first time that has been raised as a problem, Gates said – and a drifting of the Air Force's focus away from its nuclear mission, which includes stewardship of the land-based missile component of the nation's nuclear arsenal, as well as missiles and bombs assigned for nuclear missions aboard B-52 and B-2 long-range bombers.

Gates also announced that "a substantial number" of Air Force general officers and colonels were identified in the Donald report as potentially subject to disciplinary measures that range from removal from command to letters of reprimand. He said he would direct the yet-to-be-named successors to Wynne and Moseley to evaluate those identified culprits and decide what disciplinary actions are warranted – "or whether they can be part of the solution" to the problems found by Donald.

White House press secretary Dana Perino said President Bush knew about the resignations but that the White House had "not played any role" in the shake-up.

Early reaction from Capitol Hill was favorable to drastic action.

"Secretary Gates' focus on accountability is essential and had been absent from the office of the secretary of defense for too long," said Sen. Carl Levin, chairman of the Senate Armed Services Committee. "The safety and security of America' nuclear weapons must receive the highest priority, just as it must in other countries."

Gates said he would make recommendations to Bush shortly on a new Air Force chief of staff and civilian secretary. Gates has settled on candidates for both jobs but has not yet formally recommended them, one official said.

Gen. Duncan J. McNabb is the current Air Force vice chief of staff.

Moseley, who commanded coalition air forces during the initial invasion of Iraq in March 2003, became Air Force chief in September 2005; Wynne, a former General Dynamics executive, took office in November 2005.

Wynne is the second civilian chief of a military service to be forced out by Gates. In March 2007 the defense secretary pushed out Francis Harvey, the Army secretary, because Gates was dissatisfied with Harvey's handling of revelations of inadequate housing conditions and bureaucratic delays for troops recovering from war wounds at Walter Reed Army Medical Center.

Wynne and Moseley issued their own written statements.

"As the Air Force's senior uniformed leader, I take full responsibility for events which have hurt the Air Force's reputation or raised a question of every airman's commitment to our core values," Moseley said.

Wynne said he "read with regret" the findings of the Donald report.

(China Daily via agencies June 6, 2008)