irish republic army used. they blew up bombs trying to kill the prime minister, blew up bombs attacking the royal horse guard on parade, and did armed assaults. however, this method works for people who are followers of isis who are self-inspired, to go out and carry out attacks, as isis starts to collapse, and there is virtually no way to predict this type of attack. no way to predict, and no way to protect against? in this particular instance, no. the first segment of it appears it s what we call a vehicle as weapons system attack. where you take your car and you just start driving over pedestrians on a crowded bridge, may have been on a walkway coming off from westminster, and you just hit them as you see them, and then go on and conduct your assault, which is just a man with a knife or a machete. you don t know what s happening until it s actually in place.
stay in their offices, keep themselves barricaded inside until they get the all clear. as far as we know, that has not happened yet. there is still no all clear inside that building. and it sounds, andrea, like there were two incidents. however, we re not clear yet whether this was all perpetrated by one attacker, or more than one attacker, and that most likely is the reason that there is still a lockdown here. we understand it may have started on the bridge, that s what we re hearing from our witnesses, that they first heard something happening on a bridge, on the bridge. they thought perhaps it was a traffic accident. then they heard commotion at the gates, going into parliament, these are the gates that take cars straight in to parliament, one of our witnesses said he looked out the window, he saw what he describes as a heavyset man running through the gates toward a police officer, carrying what looked to be some sort of weapon, possibly a