U.S. Army Sgt Kirk Marra, Army Forces Battalion, shows the before and after glasses of water and explains the water purification process of the Pre-Positioned Expeditionary Assistance Kit (PEAK) system to Dr. Rebecca Chavez, the Deputy Assistant Secretary of Defense for Western Hemisphere Affairs, Aug. 28 during a command tour of Joint Task Force-Bravo at Soto Cano Air Base, Honduras. (Photo by Martin Chahin)