Marines walk out to a UH-60 Blackhawk helicopter operated by the 1st Battalion, 171st Aviation Regiment, New Mexico Army National Guard in a joint service exercise for preparation, situational awareness and medic familiarization during Integrated Training Exercise 4-14 aboard Marine Air Ground Combat Center, Twentynine Palms California, June 13, 2014. ITX 4-14 is the largest annual U.S. Marine Corps Reserve training exercise, which helps refine skills necessary to seamlessly integrate with active duty counterparts as well as operate as a complete MAGTF. (U.S. Marine photo by Sgt. Adwin Esters/Released)