Airmen from the 351st Air Refueling Squadron and the 100th Aircraft Maintenance Squadron review a checklist prior to a flight supporting exercise Baltic Trident at Royal Air Force Fairford, March 16, 2021. The exercise will strengthen alliances and partnerships to deter aggression, maintain stability and ensure free access to common domains in accordance with international law. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)