heard the explosion that took place outside. today this is a gesture that says we're not going to be -- we're not going to take any of that too seriously. we're not going to worry about that. these people, some 50,000, have been waiting outside for hours. they've come under very strict security. they've all been searched individually. they haven't allowed this to ruin their mood in any way, shape, or form. they are having a truly phenomenal time. ariana grande hasn't done much talking. it's all been about the singing. she hasn't explained why she thought it was important to come back. she left that to her manager who came on the stage and said that ariana had called him after the terror attack and said that if we don't do anything, i don't think i could live with myself. and so this is the result. this extraordinary event pulled together at very short notice. one that the aorganizers say wa all about the attack in manchester but means so much more after the attack in london as well.