Arch Turner

FILE - In this April 14, 2016 file photo, a drone captures videos and still images of an apartment building in Philadelphia. Federal aviation officials say so many people are registering drones and applying for drone pilot licenses, they wonder if there will eventually be millions of drones crowding the nation's skies.  (AP Photo/Matt Rourke, File)

Arch Turner: DHS science and tech group assessing aerial surveillance tactics

Homeland Security is weighing the commercial benefits of drone technology with security risks.

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