U.S. Air Force Capt. Wilfred Noel, deputy chief of the Air Force Research Lab, left, and 1st Lt. Jason Rathje, an advanced weapon design engineer with Air Force Research Lab weapons dynamics and control science branch, right, pilot quadrotor vehicles at the Research Engineering Education Facility in Shalimar, Fla., April 4, 2013. The Air Force is using quadrotors in collaboration with the REEF to develop autonomous mapping  and collaborative control.
<p>(U.S. Air Force photo/Staff Sgt. John Bainter)
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<br>Unit: Air Force Public Affairs Agency
Staff Sgt. John Bainter
Taken on 4 April 2013
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