U.S. Air Force Senior Airman Michael Maxwell, a support technician with the 31st Aircraft Maintenance Squadron, catalogs hazardous materials in an aircraft hangar at Campia Turzii, Romania, April 9, 2014, during exercise Dacian Viper 2014. Dacian Viper is a bilateral air exercise designed to enhance interoperability and readiness between the U.S. Air Force and the Romanian air force.