U.S. Air Force Capt. Maria Vazquez, 455th Expeditionary Aeromedical Evacuation Squadron flight nurse, tests an oxygen mask in preparation for an AE mission April 19, 2015 at Bagram Air Field, Afghanistan. The Aeromedical Evacuation team had traveled to Kandahar Airfield on April 19 to provide in-flight medical care to three service members.The U.S. Army Soldiers sustained multiple injuries when their mine resistant ambush protected vehicle was hit by an improvised explosive device during a mission in the Central Command area of responsibility. U.S. Air Force photo by Staff Sgt. Whitney Amstutz/released.