Pilots from the 493rd Fighter Squadron prepare to depart Royal Air Force Lakenheath, England, Aug. 29, 2017, for a deployment to Siauliai Air Base, Lithuania to assume control of the NATO Baltic Air Policing peacetime collective defense mission. The U.S. Air Force will officially assume command of the current BAP mission from the Polish military on Aug. 30. (U.S. Air Force photo/Master Sgt. Eric Burks)