Airmen, assigned to the 555th Red Horse Squadron, tighten bolts on structures that will become the roof of the new firehouse at Nellis Air Force Base, Nev., April 2, 2016. What make the 555th an invaluable asset to Nellis AFB are the relationships it shares with other squadrons on base, including the 820th RHS. (U.S. Air Force photo by Airman 1st Class Kevin Tanenbaum)