The Air Force's top civilian and uniformed leaders are being booted out of the Pentagon. Chief of Staff Gen. T. Michael "Buzz" Moseley has resigned. Secretary Michael W. Wynne is next.

The move, initially reported by Inside Defense and Air Force Times, isn't exactly a shocker. The Air Force has come under fire for everything from mishandling nukes to misleading ad campaigns to missing out on the importance of the Iraq and Afghanistan wars. Most importantly, the Air Force's leadership has been on the brink of open conflict for months with Defense Secretary Robert Gates and Deputy Defense Secretary Gordon England. That's because in the halls of the Air Force's chiefs, the talk has been largely about the threats posed by China and a resurgent Russia. Gates wanted the service to actually focus on the wars at hand, in Iraq and Afghanistan. "For much of the past year I’ve been trying to concentrate the minds and energies of the defense establishment on the current needs and current conflicts," he told the Heritage Foundation. "In short, to ensure that all parts of the Defense Department are, in fact, at war."

Last fall, the Pentagon's civilian chiefs shot down an Air Force move to take over almost all of the military's big unmanned aircraft.

"There has to be a better way to do this," Moseley complained at the time. Things only got more tense when

Gates said that the future of conflict is in small, "asymmetric" wars

\– wars in which the Air Force takes a back seat to ground forces.

Then Gates noted that the Air Force's most treasured piece of gear, the

F-22 stealth fighter, basically has no role in the war on terror.

And when a top Air Force general said the service was planning on buying twice as many of the jets – despite orders from Gates and the rest of the civilian leadership – he was rebuked for "borderline insubordination."

Relations between Gates and the Air Force chiefs soured further when the Defense Secretary called for more spy drones to be put into the skies above Iraq and Afghanistan. The Air Force complained that all those extra flight hours were turning the roboplane's remote pilots into virtual "prisoners." Gates then publicly chastised the service during the drone buildup, comparing it to "pulling teeth."

The scrapes harmed the service's image in Congress, and with the public. And so the Air Force launched an $81 million marketing effort to demonstrate its relevance in today's conflicts. Outside analysts wondered whether such a push was in violation of American anti-propaganda laws – especially after one of the spots was found be be "misleading."

But, according to Air Force Times, "the last straw appears to be a [damning] report on nuclear weapons handling... [that] critical report convinced Gates that changes must be made." That's the reason Gates gave reporters, in a Pentagon press conference today. But it might just have been the excuse he needed to can a pair of bureaucratic adversaries – read on.

The service inadvertently shipped "four high-tech electrical nosecone fuses for Minuteman nuclear warheads were [t]o Taiwan in place of helicopter batteries. The mistake was discovered in March — a year and a half after the erroneous shipment," The New York Times reports. "The mishandling of the nosecone fuses was viewed as another indication of lack of discipline within America’s nuclear infrastructure, and was another embarrassment for the people in charge of those weapons."

Last fall, the Air Force's 5th Bomb Wing lost track of six nuclear warheads. Then, in mid-May, the service flunked a nuclear surety inspection, when security personnel couldn't even be bothered to stop playing videogames on their cellphones. Now, it looks like Moseley and Wynne has some serious time to play with themselves.

Despite reports you may be reading elsewhere, this firing was not about nukes or missiles, well-placed sources say. "Far and away the biggest issue was the budget stuff, not the nuclear stuff. The UAV [unmanned aerial vehicle] fight, the F-22 deal... Gates really didn't appreciate it," one of those sources tells Danger Room. Now, with the botched missile and nuke shipments, "the SecDef [Secretary of Defense] has good cover to do something that suits him bureaucratically."

"The problem seems to be a philosophical difference between Gates and the USAF [U.S. Air Force], not anything to do with nuclear weapons," another adds. And Moseley and Wynne may not be the last to go. Rumors are swirling of more top-level Air Force officers getting the axe. Stay tuned.

LATE UPDATE: In public, at least, Gates is blaming the purge on nukes. Here's the video:

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