An Army carry team moves a transfer case containing the remains of Sgt. Allen Levi Stigler Jr. at Dover Air Force Base, Del., Tuesday, Aug. 15, 2017. According to the Department of Defense, Stigler, 22, of Arlington, Texas, died Aug. 13, 2017, of wounds sustained while engaged in combat operations in Iraq. (Steve Ruark/AP)
Marine Corps KC-130J Hercules aircraft conduct division tactical navigation training at Naval Air Station Whidbey Island, Wash., Aug. 14, 2017. (Cpl. Joseph Abrego/Marine Corps)
An Army paratrooper makes contact with the drop zone during Leapfest 2017 at the University of Rhode Island in West Kingston, R.I., Aug. 6, 2017. (Sgt. Joshua Wooten/Army)
The aircraft carrier USS Gerald R. Ford (CVN 78) pulls alongside the dry cargo and ammunition ship USNS William McLean (T-AKE 12) on Aug. 14 during a practice underway replenishment. (MC3 Mathew R. Fairchild/Navy)
Military personnel gather around the Honolulu Fire Department Command Center at a boat harbor, Wednesday, Aug. 16, 2017 in Haleiwa, Hawaii. An Army helicopter with five on board crashed several miles off Oahu's North Shore late Tuesday. Rescue crews are searching the waters early Wednesday. (Marco Garcia/AP)
An airman checks the conditions for a high altitude, low opening jump during exercise Mobility Guardian while aboard an aircraft flying over Washington state, Aug. 7, 2017. Air Force photo by Senior Airman Clayton Cupit
Sailors assigned to the U.S. Navy Ceremonial Guard Drill Team perform at the Montana Fair on Aug. 15 during Navy Week Montana. (MC2 James Vazquez/Navy)
U.S. Air Force Airmen from Air Mobility Command listen to an intelligence brief, during Exercise Mobility Guardian at Joint Base Lewis-McChord, Wash., Aug. 3, 2017. (Senior Airman Clayton Cupit/Air Force)
Defense Secretary Jim Mattis, left, presides as Deputy Defense Secretary Pat Shanahan is formally sworn into office during a ceremony in the Pentagon, Aug. 14, 2017. (Sgt. Amber I. Smith/Army)