Cpl. Kamen Pinkey, a motor transportation operator assigned to Company A, 1st Battalion, 11th Marine Regiment, 1st Marine Division, posts security for a CH-53E Super Stallion aboard Marine Corps Base Camp Pendleton, Calif., on June 17, 2015. (William Perkins/U.S. Marine Corps)

An international corps of marines from Sweden, Finland, and the U.K. conduct amphibious assaults on a beachhead in Ravlunda, Sweden, for local media outlets during BALTOPS 2015, on June 13, 2015. The amphibious forces are part of 17 NATO Allies and partner nations that are integrated in air, land, and sea operations to improve their combined-force capability to work together and to respond to threats in the Baltic region. (Tatum Vayavananda/U.S. Marine Corps)

U.S. Marines with Battalion Landing Team 2nd Battalion, 5th Marines, 31st Marine Expeditionary Unit conduct fast-rope techniques from a MV-22 Osprey assigned to Marine Medium Tiltrotor Squadron 265 (Reinforced), 31st MEU aboard the USS Bonhomme Richard out at sea, on June 13, 2015. (Ismael Pena/U.S. Marine Corps)

Lance Cpl. Brandon A. Jaggard, a machine gunner with Company B, 4th Reconnaissance Battalion, 4th Marine Division, Marine Forces Reserve, emerges from the water during the Reconnaissance Assessment at the Combat Center Training Tank at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., on June 16, 2015. (Ian Leones/U.S. Marine Corps)

A U.S. Navy Landing Craft Air Cushion assigned to Amphibious Squadron 4 Amphibious Squadron exits the well deck of the USS Kearsarge, after dropping off personnel and equipment during Amphibious Ready Group/Marine Expeditionary Unit Exercise in the Atlantic Ocean, on June 15, 2015. (Andre Dakis/U.S. Marine Corps)

Navy Lt. David Jones,chaplain for Marines with Black Sea Rotational Force, provides religious services for troops in the field on the eve of their culminating exercise with partner nations during Exercise Saber Strike at the Pabrade Training Area, Lithuania, on June 14, 2015. (Paul Peterson/U.S. Marine Corps)