Weeks of unexplained drone sightings in New Jersey have left residents, politicians and public safety officials scratching their heads, prompting security concerns. With residents and multiple public officials calling for a response to the drone activity and experts working to uncover exactly what’s going on, White House national security communications adviser John Kirby on Thursday sought to assure the public there is no threat to public safety. Learn more about your ad choices. Visit podcastchoices.com/adchoices