HENDERSON: We've been following breaking news this hour on the terror attack in London. The British prime minister, Boris Johnson, spoke about it a few minutes ago. Take a listen.</s>BORIS JOHNSON, BRITISH PRIME MINISTER: Clearly, the Metropolitan Police are continuing their investigations. And I can assure you and assure everyone that anybody involved in this crime and these attacks will be hunted down and will be brought to justice. And I think the message that we send to them and anyone associated with this type of attack is one that will be familiar. And that is that this country will never be cowed or divided or intimidated by this sort of attack; and our values, our British values will prevail.</s>HENDERSON: Nick Paton Walsh joins me from London. Your reaction to the prime minister there, talking about London not being bowed and cowed by a terror attack of this sort.</s>NICK PATON WALSH, CNN INTERNATIONAL SECURITY EDITOR: It's, sadly, a familiar message to many Londoners, many people across Britain who have seen attacks like this over the past years. This is the first time, really, that Boris Johnson as prime minister has had to deliver such a speech. And just ahead of a British general election here. But behind me, you're seeing police continuing their investigations as he said. We've just seen a substantial vehicle here coming in to presumably assist part of their investigations here. We've seen lots of armed police coming and going over the past hours. They're trying to be sure there's no residual threat in vehicles here or anywhere else in some of the many buildings here in the heart of central London. And of course, now, key question's who was this man? He is now dead. Who were the people who he attacked? Where did this attack begin? We do know police were, in fact, called to a premises at about 2 p.m., after which we see this graphic video on London Bridge. Many questions now at the heart of the investigation, not least the motivation behind this attacker. Back to you.</s>HENDERSON: Thanks so much for that report, Nick. And we'll be right back.
Police: Suspect Killed after Terror Attack Near London Bridge