U.S. Air Force Staff Sgt. Vincent Hopson, left, a rapid deployable radio frequency (RF) transmissions system supervisor with the 1st Combat Communication Squadron (CBCS), tests a radio system as Staff Sgt. Jason Webster, an RF transmissions supervisor with the squadron, listens in April 8, 2014, at Campia Turzii, Romania, in preparation for 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. The 1st CBCS was assigned to the 435th Air Ground Operations Wing at Ramstein Air Base, Germany.