Oh, and another thing for the conspiracy theorists...
The US have 58 KC-10 tanker aircraft. These are the biggest refuellers the USAF have, and are based on the civilian DC-10, and can off-load roughly double the fuel that the much smaller KC-135 can. They're all US based, and during normal times they're used to ferry cargo around the world and to support the transit of fighter jets to/from Europe, the Middle East and the Far East. However, whenever a military action is imminent, KC-10's gather at nearby bases to support fighter and bomber operations. During the 1986 raid on Libya, over 20 of them were deployed to RAF Mildenhall and RAF Fairford.
In the past month there have been a number of high profile fighter deployments to/through Europe - including F-15's, F-22's and F-35's. KC-10's have been very noticeable by their absence, to such an extent that several of these deployments have been delayed by lack of available tankers. You would normally expect one KC-10 per 4-6 fighters.
Now KC-10's aren't the most reliable beasts, so serviceability probably plays some part in this, but, I wouldn't be surprised if places like Guam and Diego Garcea currently have a large number of big grey lumps sat on them.