Capt. Clark Morgan, 36th Mobility Readiness Squadron officer in charge of contingency engineering, sets up the dynamic cone penetrometer to assess the durability of the pavement, Oct. 29, 2013, on Naval Base Guam. The DCP is hammered into the pavement to test if it is strong enough to handle large Department of Defense aircraft landing without cracking the asphalt so the airstrip will remain usable. (U.S. Air Force photo by Airman 1st Class Emily A. Bradley/Released)
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