U.S. Army Pfc. Jennifer A. Aiken, 335th Transportation Company, pulls security while other Soldiers perform first aid at the combat lifesaver certification course hosted by the 7th Transportation Brigade (Expeditionary) at Fort Eustis, Va., Aug. 11, 2016. Soldiers sought certification to gain the ability to respond and treat injuries while awaiting medic arrival. (U.S. Army photo by Spc. RomanRivera Wilmarys)

U.S. Army Soldiers perform a litter carry during a combat lifesaver course hosted by 7th Transportation Brigade (Expeditionary) at Fort Eustis, Va., Aug. 11, 2016. CLS certification includes two parts: a week in classroom and a hands-on exercise that tests the ability of the Soldier to apply classroom applications to treat a casualty. (U.S. Army photo by Spc. RomanRivera Wilmarys)

U.S. Army Soldiers low-crawl through an obstacle during a combat lifesaver course hosted by 7th Transportation Brigade (Expeditionary) at Fort Eustis, Va., Aug. 11, 2016. The combat lifesaver is a nonmedical Soldier who provides lifesaving measures as a secondary mission. (U.S. Army photo by Spc. RomanRivera Wilmarys)

U.S. Army Spc. Chelsea Kline, 7th Transportation Brigade (Expeditionary), gives combat lifesaving instructions during a combat lifesaver course hosted by 7th Transportation Brigade (Expeditionary) at Fort Eustis, Va., Aug. 11, 2016. The Combat Lifesaver may assist the combat medic in providing care and preparing casualties for evacuation when the Combat Lifesaver has no other combat duties to perform. (U.S. Army photo by Spc. RomanRivera Wilmarys)

U.S. Army Spcs. Taylor B. Pare, 393rd Transportation Company and Andrew C. Henry, 97th Transportation Company, practice 9 line MEDAVAC procedures as part combat lifesaver training at Fort Eustis, Va., Aug. 11, 2016. The 9-line is an evacuation request used to safely communicate evacuation scenarios and needs in a combat area. (U.S. Army photo by Spc. RomanRivera Wilmarys)