California Air National Guardsman Senior Master Sgt. David Solis, a communications superintendent assigned to the 129th Communications Flight, demonstrates safety precautions and climbing technique during an antenna tower training scenario at Lajes Air Base, Portugal, July 15, 2015. The guardsmen were tasked to decommission three towers during their one-week temporary duty assignment. (U.S. Air National Guard photo by Senior Airman Brian Jarvis)