U.S. Marine Corps Detachment students put together a versatile radio observation and direction finder in preparation for an intelligence field exercise outside of the MCD on Goodfellow Air Force Base, Texas, Dec. 6, 2019. Goodfellow falls under the Air Education and Training Command and offers exceptional training for all branches of the military and America’s Allies. (U.S. Air Force Photo by Airman 1st Class Abbey Rieves)