Vigilant Guard Exercise
Capt. Brian Loveless (from left), Staff Sgt. Joseph Reed and Capt. Luke Stumme, members of the 817th Contingency Response Group's "Alpha Mike" airfield assessment team, conduct density tests on soil beneath a runway during the Vigilant Guard exercise in Puerto Rico March 23 to 29. The completed assessment will be used "real-world" to certify the runway for use by various mobility aircraft. The 817th CRG is part of the 621st Contingency Response Wing at McGuire Air Force Base, N.J. (U.S. Air Force photo/1st Lt. Dustin Doyle)