welcome back to this special edition of american morning. a live picture right now of buckingham palace on tuesday, april 26th. we have a great vantage point high above queen victoria s fountain, right in front of buckingham palace. at exactly 11:30, what time it is here, the changing of the guards takes place. the guards on duty at the palace early in the morning switchover. some of the video, this is a very exciting event that happens, but made all the more so because of how many more tourists are here for wedding week. this is one of the best vantage points to get a look at this and we had it pass right before our eyes a moment ago. also coming up in just a few moments we re going to be looking into how london is planning on keeping the hundreds of thousands of people here on the streets safe. so we re going to talk about that coming up with former commander of special operations at new scotland yard. for now back to ali and