UFO report: Are we alone?

On the Sky News Daily podcast with Dermot Murnaghan we examine how sightings of unidentified flying objects went from conspiracy theory to US government inquiry – after officials told American media they can’t confirm or rule out alien activity. We hear from Sean Cahill, who was the Chief Master-at-Arms on the USS Princeton in 2004 during a multi-day UFO encounter, plus 'UFO researcher’ Chris Jones and Scotland's Astronomer Royal Prof Catherine Heymans.Daily podcast team:Podcast producer - Annie JoycePodcast producer - Nicola EyersPodcast producer - Lauren PinkneyInterviews producer - Tatiana AldersonArchive - Simon WindsorArchive - Rob FellowesArchive - Nelly StefanovaMusic - Steven Wheeler