Marines fire one of 120 mm illumination mortar rounds to set a base plate into the ground at Bost Airfield in Lashkar Gah, Afghanistan, May 22, 2017. Marine Corps photo by Sgt. Justin T. Updegraff
Air Force second lieutenants celebrate during their graduation ceremony at the Air Force Academy in Colorado Springs, Colo., May 24, 2017. Air Force photo by Tech. Sgt. Julius Delos Reyes
A soldier rappels down a wall at Moody Air Force Base, Ga., May 17, 2017, during an assessment measuring aptitude in air assault operations, completion of equipment layouts and rappelling. Air Force photo by Tech. Sgt. Zachary Wolf
Sailors and Marines man the rails of the USS Kearsarge as it passes by the Statue of Liberty during Fleet Week New York in New York City, May 24, 2017. Navy photo by Chief Petty Officer Travis Simmons
The Blue Angels, the Navy's aerial demonstration team, fly FA-18 Hornets during commissioning week over the U.S. Naval Academy in Annapolis, Md., May 24, 2017. DoD photo by Marvin Lynchard
Soldiers climb across a rope during United Accord 2017 at the Jungle Warfare School in Achiase military base in Akim Oda, Ghana, May 20, 2017. Army photo by Spc. Victor Perez Vargas
Navy Petty Officer 1st Class Sean Dargie connects with a visitor at the New York Aquarium during the 29th annual Fleet Week New York, May 24, 2017. Navy photo by Petty Officer 2nd Class Charles Oki