NBC Nightly News with Tom Llamas Full Episode - Sept. 14

Tonight: President Trump waded deep into the current debate over the safety of artificial intelligence as leaders throughout the tech industry are warning of its risks and urging a slow down in development. This as the president is defending his son Don, Jr. after a report suggested that a Russian man with links to Putin’s inner circle paid for a portion of his wedding party. Plus, on a small plane ride home after a campaign event, Congressman Tom Tiffany, the Republican nominee for Governor, fo