Detailed text transcripts for TV channel - MSNBC - 20170322:18:21:00
>> i think they're worried, obviously, as any security forces are, about copycat attacks, about attacks -- one attack triggering others. also, of course, about the chance that this wasn't a lone actor. that there may be others involved on the ground. in london you're kind of constantly reminded about the threat and of course in europe where we've seen these kind of attacks in recent months. sensitive sites like train stations, public spaces, you are reminded to be wary. if you go on the tube, on the underground in london, there are announcements about making sure you're kind of wary of suspici...