FALCON FUEL U.S. Air Force Staff Sgt. Daniel Maas carefully operates the boom of a KC-135 Stratotanker aircraft, Jan. 20, 2008, while refueling an F-16 Falcon aircraft returning to Eielson Air Force Base, Alaska, from Kunsan Air Base, South Korea. Mass is a boom operator with 909th Air Refueling Squadron. SHARE: Download: Full Size (0.01 MB) Credit: VIRIN: 687424-T-RBE68-088.jpg Photo Gallery