Block 8.1
U.S. Air Force Capt. Carl Scott, 41st Airlift Squadron C-130J pilot and tactics officer, prepares a C-130J for its first flight using Block 8.1 upgrades Feb. 3, 2017, at Little Rock Air Force Base, Ark. The Block 8.1 upgrade enhances GPS capabilities, communications systems, updated friend-or-foe identification and allows the C-130J to comply with worldwide air traffic management regulations. (U.S. Air Force photo/Senior Airman Harry Brexel)