what that means is the police, intelligence services believe and attack could well be imminent, that also means that tomorrow, today we affect to be 5,000 soldiers on the streets of london. they do not know enough about the attack himself. whether or not he acted alone or whether he was part of a larger network. we know a little bit about him so far. this is a man who on monday and it blew up a suicide device while people were leaving the concert of ariana grande aimed at killing and inflicting as much damage as possible among young children, the kids of the others just eight years old. 12 and 22 were killed. what we know about him so far is his name, salman abedi. he was born in manchester but he was from his parents were refugees. he had recently returned from a trip to libya. that is the site of a story to see if perhaps there was an angle there.