FBI and aviation experts said a majority of what people saw were actually manned aircraft

Experts target social media for fomenting underlying anxiety

Experts insist most sightings are of safely functioning aircraft, but regulatory oversight not up to speed

As drone frenzy grows, federal officials are offering more and more ideas

Lack of clarity seems to undermine federal assurances the drones pose no threat

Federal officials addressed a congressional hearing Tuesday about the puzzling phenomenon

Law enforcement say there is no immediate threat