Guardian Challenge
Tech. Sgt. Travis Silvers, from the 137th Space Warning Squadron, Senior Airman Christopher Malloy and Senior Airman Matthew Masciorini, from the 460th Security Forces Squadron, and Senior Airman Romy Vazquez, from the 137th SWS, run as the 460th SFS team in the Guardian Challenge 2006. (U.S. Air Force photo by Airman 1st Class Michelle Cross )

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