Tech. Sgt. Justin Andreas, 554th REDHORSE Squadron Fire Emergency Services Contingency Training instructor, demonstrates rapelling to students from the Republic of Korea Air Force April 22, 2018, at Andersen Air Force Base, Guam. The training took part during the routine Silver Flag, testing the U.S. and its partner nations on their capabilities to perform emergency services in all types of scenarios. (U.S. Air Force photo by Tech. Sgt. Jake M. Barreiro)