U.S. Marine Corps photo by Senior Airman Daniel Hughes/Released 130227-F-AQ406-089.JPG
Mar 5, 2013
Staff Sgt. Christine Phillips, 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineers Airborne from Nellis Air Force Base, Nev., puts away a Dynamic Cone Penetrometer after measuring the layers and hardness of soil on Sicily Air Field Feb. 21, 2013, at Fort Bragg, N.C. This measurement is one of the steps in determining if an airfield is safe for aircraft landings. (U.S. Air Force photo by Senior Airman Daniel Hughes)
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