Joint terminal attack controllers from the Slovenian Armed Forces conduct urban warfare training exercises during Adriatic Strike 2018, Celje, Slovenia, June 4, 2018. The Colorado Air National Guard, 140th Wing, Buckley Air Force Base, Coloo. brought four F-16 Fighting Falcons and approximately 40 support personnel to participate in Adriatic Strike 2018, a Slovenian-led JTAC training attended by 22 other NATO nations to conduct interoperability training and joint readiness capabilities among the NATO allies and partners. (U.S. Air National Guard photo by Staff Sgt. Michelle Y. Alvarez-Rea)

Kristen Morris, Department of Defense Warrior Games athlete on Team Air Force, practices her backstroke during a swimming training session in Colorado Springs, Colo., June 5, 2018. Morris will compete against athletes from the other U.S. military services, as well as athletes representing the United Kingdom, Australia and Canada. (U.S. Air Force photo by Senior Airman Dennis Hoffman)

A formation of C-130J Super Hercules assigned to the 37th Airlift Squadron flies over the English Channel June 2, 2018. The 37th AS is a descendant unit of the 37th Troop Carrier Squadron, which dropped paratroopers over Normandy, France, on D-Day. (U.S. Air Force photo by Senior Airman Joshua Magbanua)

Team Air Force veteran Senior Airman Brett Campfield competes in the visually impaired category for archery during the 2018 DoD Warrior Games at the Air Force Academy in Colorado Springs, Colo., June 7, 2018. (DoD photo by EJ Hersom)

Airmen from the 179th Airlift Wing, Mansfield, Ohio, conduct Ability to Survive and Operate training course, June 5, 2018, held at the Alpena Combat Readiness Training Center, Alpena, Mich. The Airmen don mission oriented protective posture protective gear used by U.S. military personnel in a toxic environment during a chemical, biological, radiological, or nuclear strike. Rotating through stations, Airmen train how to correctly put on MOPP gear and help others put it on, medical Self-Aid Buddy Care, correct decontamination procedures and how to give a detailed report to security personnel about any suspicious people or activities. (U.S. Air National Guard photo by Tech. Sgt. Joe Harwood)

The U.S. Air Force Thunderbirds practice their aerial performance over Cannon Air Force Base, N.M., May 25, 2018. The Thunderbirds practiced to perform twice over the Memorial Day weekend for the 2018 Cannon Air Show, Space and Tech Fest. (U.S. Air Force photo by Senior Airman Luke Kitterman)

A C-130H Hercules loadmaster assigned to the 746th Expeditionary Airlift Squadron, Al Udeid Air Base, Qatar, listens to pilot instructions prior to a combat airdrop over an undisclosed location June 3, 2018. This was the first combat air drop for the loadmaster who is deployed from the 908th Airlift Wing, Maxwell Air Force Base, Ala. (U.S. Air Force photo by Master Sgt. Burt Traynor)

U.S. Army paratroopers joined paratroopers from several nations during a paradrop as part of the commemoration of the D-Day invasion of June 6, 1944, during World War II, in Normandy, France. Aircraft from the U.S. Air Force's 86th Airlift Wing and multiple other countries and units participated in the event. (U.S. Air National Guard photo by Lt. Col. Misty Hitchcock)

A U.S. Air Force A-10 Thunderbolt II assigned to the 163rd Fighter Squadron flies a mission over Afghanistan, May 28, 2018. The A-10, which can loiter near battle areas for extended periods of time and operate in low ceiling and visibility conditions, provides close-air support for coalition forces and the Afghan National Defense and Security Forces on the offensive against the Taliban. (U.S. Air Force photo by Staff Sgt. Corey Hook)

Retired Senior Airman Heather Carter takes a break with service dog Rocky after competing in sitting volleyball at the Department of Defense Warrior Games 2018. Warrior Games is a Paralympic style competition where wounded warriors compete in 11 different adaptive sporting events. Competition this year started June 1 and runs through June 9. (U.S. Air Force photo by Master Sergeant David Long)

Army Staff Sgt. Ross Alewine, left, Air Force veteran Russell Logan, and Army 1st Sgt. Jarrid Collins of Team SOCOM (U.S. Special Operations Command), leave the starting blocks of the 100-meter track event, June 2, 2018, at the Department of Defense Warrior Games. The Warrior Games, taking place June 1-9, 2018, at the U.S. Air Force Academy in Coloo. are a paralympic-style competition for wounded, and injured service members from all U.S. branches of service and this year include teams from the United Kingdom Armed Forces, Australian Defense Force and Canadian Armed Forces. (DoD photo by Master Sgt. Stephen D. Schester)