U.S. Marines with Marine Heavy Helicopter Squadron 772, Marine Aircraft Group 49, 4th Marine Aircraft Wing, Marine Forces Reserve, refuel A CH-53E Super Stallion on an airstrip at Camp Wilson, Marine Air Ground Combat Center Twentynine Palms, California, June 21, 2017 in preparation for night missions in support of the 2nd Battalion, 25th Marine Regiment, 4th Marine Division, MARFORRES, final battalion exercise of Integrated Training Exercise 4-17. ITX 4-17 is a live-fire and maneuver combined arms exercise designed to train battalion and squadron-sized units in the tactics, techniques, and procedures required to provide a sustainable and ready operational reserve for employment across the full spectrum of crisis and global engagement. (U.S. Marine Corps photo by Imari J. Dubose)