UmmaGawd (Tommy Tibajia), a pilot in the Drone Racing League, flies his quadcopter in an abandoned power plant in New York. The Drone Racing League hide caption

toggle caption The Drone Racing League

Chinese brand DJI Technology Co. has become the leading supplier in the commercial drone market. The Phantom 2 Vision+ drone pictured functions by remote control. Kin Cheung/AP hide caption

toggle caption Kin Cheung/AP

An illustration shows what a helicopter drone would look like on the surface of Mars. NASA/JPL-Caltech hide caption

toggle caption NASA/JPL-Caltech

Journalist Scott Shane says that the videos and DVDs of the late imam Anwar al-Awlaki (above) continue to inspire terrorist acts. Muhammad ud-Deen/AP hide caption

toggle caption Muhammad ud-Deen/AP

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