JOHN BERMAN, CNN ANCHOR: Happening now, just a giant day in the United Kingdom. Theresa May just left 10 Downing Street for one of the last times as Britain's prime minister. This is the picture. This happened just a short time ago. She will formally resign very shortly after addressing parliament one last time. Then Boris Johnson will be invited by the queen to replace her. A lot of ceremony, but beyond the ceremony, just huge consequence. CNN's Nic Robertson live at 10 Downing Street witnessing history in the United Kingdom. Nic.</s>NIC ROBERTSON, CNN INTERNATIONAL DIPLOMATIC EDITOR: It really is and it really feels like that today. This was almost the last time Prime Minister Theresa May left Downing Street. She gets one more shot. She addresses the House of Commons. It won't be as raucous as the prime minister's</s>ALISYN CAMEROTA, CNN ANCHOR: Yes, Nic, we're going to sort out your microphone issues and get back to you with all that is breaking news there in the U.K. Meanwhile, comedian Jon Stewart had a message from Senator Rand Paul.</s>JON STEWART, 9/11 FIRST RESPONDER ADVOCATE: He called me a guttersnipe. I have -- I have the mind to call him a scalawag and a ragamuffin. I'll escalate this.</s>CAMEROTA: There were a lot of levity. There were a lot of emotions. The whole range of emotions from these guys. So we'll play you more of my exclusive sit-down with Jon Stewart and John Feal moments after winning their fight for 9/11 first responders.
Johnson to Become U.K. Prime Minister