seven people killed and. dozens wounded. police shot and killed the terrorists. attention switches to manchester. pop stars are performing a benefit concert tonight. phil black is on the scene there. tensions must be a bit higher after what happened in london. >> reporter: yeah, indeed. tensions higher. emotions a lot more raw, john. the organizers say the concert will regardless and will continue with greater purpose as a result of the events in london last night. they talk about a sense of responsibility to the people who were lost and affected not just in manchester but london as well. the stars appearing, arianna grande, katy perry, justin bieber, cold play are determined to go ahead, we're told. they'll be sending a message that says that fear and hate cannot win. it will be a huge security operation to keep the 15,000 audience safe on top of the big