US Air Force (USAF) AIRMAN First Class (A1C) Corvus Lowery, Boom Operator, 909th Air Refueling Squadron (ARS), Kadena Air Base (AB), Okinawa, calculates weight and balance for his KC-135 Stratotanker. The aircraft is on station participating in the Joint Exercise TANDEM THRUST 03, a joint exercise conducted in the Marianas Islands to include Guam and Tinian. The exercise is a joint endeavor to include forces from the US, Canada, and Australia