Afghan National Army (ANA) Pvt. Asadullah Hkalid, center, a medic with the 215th Corps, listens to U.S. Navy Lt. Brett Salazar, right, an en route care course instructor, as he explains how to use intravenous bags at Camp Tombstone, Helmand province, Afghanistan, Dec. 9, 2013. The instruction was part of a two-week course designed to provide ANA medics with advanced training in ambulatory care.