aircraft, drones have become another hazard in an already- risky business. imagine suddenly seeing something like this heading sraight at your helicopter. >> i saw it come right by my wind screen to the right. >> reporter: pilot jason thrasher had a near-miss with a drone in a fire last year. a drone weighs just a few pounds. it's sort of this big. your helicopter is a pretty good size. could it do you any harm? >> absolutely. if a drone like that were to go into a tail rotor or main rotor system, it could have catastrophic consequences. >> reporter: cal fire has launched a campaign urging drone pilots to stay away, and there are growing demands for drone regulations. nasa is developing an air traffic control system for a day when drones are as common as cars. nasa scientist parimal kopardekar. >> there could be a future where every home could have a drone and every home could serve as an airport. >> sean suitter's company, micro avionics, has developed kechnology that could make every