The Federal Aviation Administration has taken a big step forward on drones: It’s now allowing some filmmakers to operate robotic flying cameras on commercial movie and TV sets. Thursday’s decision marks the first time the agency has granted a commercial entity an exemption from the rules that prohibit drones from flying in U.S. airspace without a special certificate. The civil drone industry has been pressuring the FAA to relax that ban and to develop new regulations designed to safely integrate unmanned vehicles into the nation’s air traffic system. Read more at The Washington Post…