Look at Incirlik on satalite and tell me that an undetected trained force wouldn't be able to punch through the secure area perimeter and capture at least several of the aircraft enclosures before anybody really knew what was happening. Used to be that the nukes were kept in a series of bunkers way out on the NE of the airfield until a security audit got done and they realized they were even more vulnerable out there. I mean we can't keep nuns out of Y-12 in America so I think any assumptions about good security is and how fast it would respond to an incursion should be open to question.
the problem is, they would be detected and dealt with long before they got "inside the wire"