Wired Magazine’s web site has a report of US Department of Homeland Security briefing on the potential use of hobbyist drones as weapons of terror or assassination.
“The conference was open to civilians, but explicitly closed to the press,” Wired said. However it was able to report: “The officials played videos of low-cost drones firing semi-automatic weapons, revealed that Syrian rebels are importing consumer-grade drones to launch attacks, and flashed photos from an exercise that pitted $5,000 worth of drones against a convoy of armored vehicles. (The drones won).”
And: “[There was] an exhibit table outside the auditorium, where a buffet of low-cost drones had been converted into simulated flying bombs.”
One quadcopter, strapped to 1.2kg of simulated explosive, was a DJI Phantom 2, a newer version of the same drone that landed on the White House the following week.