was also have been believed to have been carried out by isis-k. so it has been a group of concern. it has carried out devastating attacks. but if you look at what unfolded on thursday. that attack, michael, it doesn't -- unfortunately, it doesn't take much. while it is a complex, coordinated attack as it's been described by u.s. officials. to create this kind of -- inflict this kind of maximum damage, maximum casualty, maximum horror that we saw on thursday unfortunately when you have that sort of crowd, it doesn't take much to do that. we have to wait and see when it comes to forensics, what u.s. officials will have to say about that and what kind of explosives may have been used. what kind of -- what kind of device was potentially used. but i, also, found interesting, michael, looking at that statement. that claim of responsibility by isis-k. while u.s. officials are saying it was two bombings and small arms fire afterwards which