U.S. Marine Corps Col. Thomas E. Prentice, commanding officer, 23rd Marine Regiment, 4th Marine Division, Marin Forces Reserve, conducts reconnaissance of the training area at Marine Air Ground Combat Center Twentynine Palms, California during Integrated Training Exercise 4-17, June 20, 2017. The scouting mission was in preparation of the 25th Marine Regiment final battalion exercise during ITX 4-17. (U.S. Marine Corps photo by Imari J. Dubose)