Research and various other reasons' behind hullabaloo - but why didn't someone say that a month ago? Time to pack it up and go home, drone conspiracy theorists: The White House has finally offered an explanation for those mysterious New Jersey drone sightings from late last year - though its rather vague statement raises more questions than it answers.

Donald Trump's press secretary Karoline Leavitt said the drones were for research purposes and 'not the enemy.'