Angels on-call: 1st Expeditionary Rescue Group - Operating Location Alpha
A pilot assigned to the 46th Expeditionary Rescue Squadron checks avionics systems on an HH-60G Pave Hawk helicopter prior to a sortie November 22, 2017, in an undisclosed location. Combat search and rescue aircrews frequently train in low-light conditions to keep skills sharp should they ever be called to recover isolated personnel under the cover of night. (U.S. Air Force photo by Staff Sgt. Joshua Kleinholz)