Airman 1st Class James Greene sets up a perimeter during an exercise Oct. 7, 2010, at Hill Air Force Base, Utah. He is assigned to the 419th Security Forces Squadron. (U.S. Air Force photo/Airman 1st Class Devin Doskey) Photo essay: Hill Airmen hone skills during exercise by Airman 1st Class Devin Doskey 2nd Combat Camera Squadron 10/20/2010 - HILL AIR FORCE BASE, Utah (AFNS)  -- Members of the 419th Security Force Squadron sharpen their skills here Oct. 7 during Operational Readiness Exercise 10-4 in preparation for an upcoming inspection. View the slideshow.