U.S. Marines with Company F, Battalion Landing Team 2nd Battalion, 4th Marines, 31st Marine Expeditionary Unit conduct a nighttime boat operation exercise using Combat Rubber Raiding Craft as part of Amphibious intergration Training aboard the USS Green Bay (LPD 20), at sea, March 11, 2015. The Marines and Sailors are currently conducting their Spring Patrol of the Asia-Pacific region. (U.S. Marine Corps photo by GySgt Ismael Pena/Released)