who fell through the cracks and how closely were they monitoring this person to make sure he wasn t a threat to the public. as wee speak, officials in britain are searching the residence believed to be associated to this person and get as much information as they can. we focus on the immediate incident and behind the scenes and told others are sharing information trying to determine whether this was someone either inspired or directed by a terrorist group, a conspiracy or this person acted alone. we re told u.s. law enforcement paying close attention to developments. i spoke to a number of police officials who tell us they re monitoring the situation and allocating resources to guard against any potential copycat attacks. our terrorism analyst, what does this say about the threat