Small drones weighing under 250g (0.55 pounds) could fly over people, depending on their design, while larger drones up to 4 – 5 pounds could do the same, depending on their design, if they stay 20 feet overhead or 10 feet away laterally. Larger or riskier drones that could cause serious injury — as determined by yet-to-be-implemented crash tests — up to 55 pounds could not be flown over crowds, and would have more limitations. Finally, the fourth group of drones that also pose a potentially serious risk but are intended to be used over crowds would have the most rules, with documented plans for risk mitigation, higher operator qualifications, and possibly coordination with the FAA or local law enforcement. – Richard Lawler, Engadget http://ift.tt/1WgfTjH