U.S. Air Force F-35A Lightning II fighter aircraft, assigned to the 421st Fighter Squadron, Hill Air Force Base, Utah, taxi on the flightline at Spangdahlem Air Base, Germany, June 11, 2019. Multiple F-35s arrived as part of a Theater Security Package. The aircraft have a unique combination of stealth, speed, and agility, making them some of the best dominance fighters in the world. (U.S. Air Force photo by Airman 1st Class Valerie Seelye)

U.S. Air Force F-35A Lightning II fighter aircraft, assigned to the 421st Fighter Squadron, Hill Air Force Base, Utah, arrive at Spangdahlem Air Base, Germany, June 11, 2019. Multiple F-35A Lightening II fighter jets are visiting Europe to participate in exercises and conduct training with other Europe-based aircraft as part of a Theater Security Package. (U.S. Air Force photo by Airman 1st Class Jovante Johnson)

Three C-130J Super Hercules, belonging to the 37th Airlift Squadron on Ramstein Air Base, fly in a four-ship formation with a C-17 Globemaster III trailing a mile behind over the Atlantic Ocean near Normandy, France, June 5, 2019. The 37th AS is a legacy squadron to the 37th Troop Carrier Squadron, who on D-Day, June 6, 1944, accurately dropped hundreds of paratroopers onto the intended drop zone. The objective: to seize the city of Sainte-Mère-Église. The precision and accuracy carried out by the 37th TCS allowed the paratroopers to quickly take the city. Later, it would be discovered Sainte-Mère-Église was the first city liberated in France by Allied forces, in part because of the effort provided by the 37th TCS. (U.S. Air Force photo by Senior Airman Kristof J. Rixmann)

Three U.S. Air Force F-15s, assigned to the 48th Fighter Squadron at RAF Lakenheath, England, fly in formation behind a U.S. Air Force KC-135 Stratotanker off the Southern coast of England, June 6, 2019. The F-15s were painted with heritage markings in honor of the 75th anniversary of D-Day. As we commemorate D-Day 75, U.S. forces in Europe remain committed to collective defense and cooperative security alongside European allies and partners. (U.S. Air Force photo by Senior Airman Benjamin Cooper)

An F-15C Eagle and a pair of heritage painted F-15E Strike Eagles assigned to the 48th Fighter Wing conduct a flypast over Normandy, France in support of the 75th anniversary of D-Day June 9, 2019. An epic multinational operation, D-Day forged partnerships and reinforces trans-Atlantic bonds that remain to this day. (U.S. Air Force photo/ Tech. Sgt. Matthew Plew)

U.S. and Italian Air Forces aircraft consisting of F-35 Lightning IIs, F-16 Fighting Falcons, and a B-52 Stratofortress, fly in formation over the Adriatic Sea during Astral Knight 19, June 4, 2019. Astral Knight is an exercise taking place throughout various locations in Europe, involving over 900 Airmen and supports the collective defense and security of NATO allies and U.S. forces in Europe. (U.S. Air Force photo by Staff Sgt. Joshua R. M. Dewberry)