How big of a role did pilot error play in recent crashes and close-calls? Transportation Secretary Sean Duffy said they were all “very unique” but added "a majority probably of the errors go to the pilots." He called for pilots to face serious consequences when they disregard air traffic controllers, including losing their licenses. NBC News' Tom Costello spoke with him exclusively as he rolled out plans to add more air traffic controllers. | NBC Nightly News with Tom Llamas