Drones accounted for nearly two-thirds of all reported near-midair collisions involving passenger planes last year.

The threat from drones has become more acute in the last decade as the use of quadcopters and remote-controlled planes has exploded in popularity

An APr analysis shows drones last year accounted for nearly two-thirds of reported near midair collisions involving commercial aircraft at major U.S. airports. Safety experts such collisions could be catastrophic.