U.S. Air Force F-16C Fighting Falcon pilots assigned to the 121st Fighter Squadron, 113th Wing, District of Columbia, Air National Guard and Polish F-16 pilots prepare to conduct bilateral training at Lask Air Base, Poland during Aviation Rotation 19.4, September 20, 2019. U.S. aircraft and Airmen have participated in aviation rotations in Poland since 2012 as part of a continuing effort to demonstrate the U.S. commitment to collective security and dedication to enduring peace and stability in the region. (U.S. Air Force photo by Airman 1st Class Kyle Cope)