Since Jan. 1 of this year, according to congressional testimony presented Thursday by the Government Accountability Office, the Federal Aviation Administration has authorized 106 federal, state and local government “entities” to fly “unmanned aircraft systems,” also known as drones, within U.S. airspace. “We are now on the edge of a new horizon: using unmanned aerial systems within the homeland,” House Homeland Security Oversight Subcommittee Chairman Michael McCaul (R.-Texas) said