Flags are on displayed at a memorial for Staff Sgt. Enrico Antonio Rojo, held aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Jan. 21, 2018. He served in the Marine Corps Reserve from 2009-2016. Staff Sgt. Rojo was awarded a Navy and Marine Corps Medal for attempting to help the victim of a car accident on December 16, 2016. (U.S. Marine Corps photo by Pfc. Rachel K. Porter) - Flags are on displayed at a memorial for Staff Sgt. Enrico Antonio Rojo, held aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Jan. 21, 2018. He served in the Marine Corps Reserve from 2009-2016. Staff Sgt. Rojo was awarded a Navy and Marine Corps Medal for attempting to help the victim of a car accident on December 16, 2016. (U.S. Marine Corps photo by Pfc. Rachel K. Porter)

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) - 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)

Lance Cpl. Randy Freed, a Reserve Marine from Echo Company 2nd Bn., 25th Marines, takes up a security position with his M249 Squad Automatic Weapon on the edge of a dry ravine running through Range 400 here June 30, 2008. The Marines conducted the rehearsal in mid-day temperatures topping 110 degrees in preparation for the following day's live-fire exercise. - Lance Cpl. Randy Freed, a Reserve Marine from Echo Company 2nd Bn., 25th Marines, takes up a security position with his M249 Squad Automatic Weapon on the edge of a dry ravine running through Range 400 here June 30, 2008. The Marines conducted the rehearsal in mid-day temperatures topping 110 degrees in preparation for the following day's live-fire exercise.