Lance Cpl. Kevin S. Millican stands security during casualty evacuation drills at Fort Stewart, S.C., on Feb. 25, 2016. (Nicholas Baird/U.S. Marine Corps)

MV-22 Ospreys with Marine Medium Tiltrotor Squadron 263, Special-Purpose Marine Air-Ground Task Force-Crisis Response-Africa take off from Albacete airport, Spain, en route to La Felipe drop zone in order to participate in exercise Sky Soldier on Saturday, Feb. 27, 2016 (Kassie McDole/U.S. Marine Corps)

Norwegian Leopard tank crews from the Telemark Battalion prepare for a live-fire exercise in Rena, Norway, Feb. 18, 2016. The U.S. Marines and Norwegians are preparing for Exercise Cold Response 16. (Chad McMeen/U.S. Marine Corps)

A Norwegian soldier provides security as the USS Fort McHenry is towed to a pier as a part of Cold Response 16 on Sunday, Feb. 28, 2016, at Trondheim, Norway. (Bryson Jones/U.S. Marine Corps)

Four EA-6B Prowlers belonging to each Prowler squadron at Marine Corps Air Station Cherry Point conducted a "Final Four" division flight aboard the air station Tuesday, March 1, 2016. (Neysa Huertas Quinones/U.S. Marine Corps)

Norwegian Minister of Defense Ine Marie Eriksen Soreide leaves shortly after talking with the U.S. Marines at a training area near Steinkjer, Norway during Exercise Cold Response on Wednesday, March 2, 2016. (Dalton Precht/U.S. Marine Corps)

U.S. Marines with 3rd Reconnaissance Battalion test a combat rubber raiding craft Tuesday, March 1, 2016, at Kin Blue, Okinawa, Japan. (Robert D. Williams Jr./U.S. Marine Corps)

U.S. Marine amphibious assault vehicles supported NATO allies and partners with ship-to-shore capabilities through the Namsos fjord during Exercise Cold Response 16, Thursday, March 3, 2016. (Chad McMeen/U.S. Marine Corps)

Secretary of the Navy Ray Mabus, and U.S. Marine Corps leaders of Marine Corps Recruit Depot Parris Island, S.C, watch U.S. Marine Corps recruits with Delta Company, 1st Recruit Training Battalion, as they conduct pugil stick training Thursday, March 3, 2016. (Colby Cooper/U.S. Marine Corps)

Norwegian soldiers, U.S. Marines, Dutch and U.K. Royal commandos complete an integrated air insert during a training event for Exercise Cold Response 16, Thursday, March 3, 2016, around the city of Namsos, Norway. (Chad McMeen/U.S. Marine Corps)