Seaman Kyler Webb, a hospital corpsman from the Naval Health Clinic, Corpus Christi, conducts tests on water from the water bowl to ensure it contains proper amounts of chlorine, during Integrated Training Exercise 4-18 in Marine Corps Air Ground Combat Center Twentynine Palms, Calif., June 17, 2018. MCAGCC Twentynine Palms has 28 water bowls placed throughout base and nine containers that are transportable for training during ITX 4-18. Each water bowl holds 400 gallons and each container can hold 900 gallons. (U.S. Marine Corps photo by Lance Cpl. Samantha Schwoch/released)