Arrival. the one that s ahead of you reported a drone that flew right under it. yeah, we re on so we re probably considerably higher than we should be. a drone going into an engine can destroy an engine, into a cockpit window can injure a pilot or scare a pilot. reporter: the faa reports 25 drone incidents each month. in the case of delta flight 407, the plane landed safely but now the faa is investigating the incident. now there are laws that limit drones and where they can fly. they are not supposed to fly above 400 feet or get within 5 miles of a commercial aircraft. investigators are looking for the operator of this drone and ....