On Aug 9th we reported on a suspicious Boeing 757 operated by the US Air Force Special Operations Command at Shannon. We highlighted that the plane, with registration 02-4452, appears to be used to support US special forces and CIA operations.
While the plane falls under the aegis of Air Force Special Operations Command, it is in fact operated by 486th Flight Test Squadron which the American Special Ops website describe as "highly secretive units, with little information publicly available about their activities". They have two aircraft, both of them are C-32B's or former Boeing 757s. One is 02-4452 which we photographed at Shannon on Aug 9th. The other is 00–9001.
Both of these very suspicious aircraft have been refuelling at Shannon over the past month.