joining me from london, duncan guardham and kevin barron, the ecutive editor of defense one and senioruan saurte, for combatting terrorism under george w. bush. duncan, let me begin with you, we have this late morning -- early morning notification, late morning in uk about the 12 arrests that happened overnight. how likely is it that these dozen people were on the radar of the police or is it just good work based on who the three suspects are? >> i would say it's quite likely they were on the radar. there's an extensive number of people that are on the security services radar these days running up to 20,000 individuals that they have looked at over the years. and around 3,000 that are currently being looked at. so that's quite a large number. the area in east london they are looking at has been a hot bed for some activity and so i would be surprised perhaps if they weren't already on the radar. >> here we are two weeks past what happened in manchester and that horrendous attack that is just four hours northwest of what happened at the london bridge in the area surrounding it. we have t