An A-10C Thunderbolt II aircraft from the 175th Wing, Maryland Air National Guard, flies overhead after a simulated assault on enemy boats Aug. 16, 2017, during Operation Heatwave in the waterways around Roomassaare Port, Estonia. The flying training deployment is funded by the European Reassurance Initiative in support of Operation Atlantic Resolve. The U.S. Air Force’s forward presence in Europe allows the U.S. to work with allies and partners to develop and improve ready air forces capable of maintaining regional security. (U.S. Air National Guard photo by Airman 1st Class Sarah M. McClanahan)