Keywords: Colorado Air National Guard airman maintains perimeter security.jpg U S Air Force Tech Sgt Derek Castellano foreground assigned to the 140th Security Forces Squadron Colorado Air National Guard maintains perimeter security while fellow Airmen perform self-aid and buddy-care on a simulated casualty during an operational readiness exercise at Buckley Air Force Base Colo March 10 2012 The ORE was designed to evaluate the units ability to conduct operations in a deployed environment DoD photo by Master Sgt John Nimmo Sr U S Air Force /Released https //www flickr com/photos/39955793 N07/6830354448/ 120310-F-XL333-101 2012-03-10 11 19 https //www flickr com/people/39955793 N07 U S Department of Defense Current Photos PD-USGov U S Department of Defense Current Photos https //flickr com/photos/39955793 N07/6830354448 2016-09-03 12 11 20 United States Government Work 140th Wing Colorado Air National Guard Buckley Air Force Base |