FILE PHOTO -- A KC-10A Extender from McGuire Air Force Base, N.J., prepares to refuel a B-2 Spirit bomber during a training exercise on March 23, 2001. Although the KC-10's primary mission is aerial refueling, it can combine the tasks of tanker and cargo aircraft by refueling fighters while carrying the fighters' support people and equipment during overseas deployments. (U.S. Air Force photo by Gary Ell)