as we reported yesterday, a credible threat intelligence stream that the u.s. had about plots, planning and capability to carry out an attack targeting exactly a gate like this and exactly a crowd like this that has been gathering at these gates. i want to go now to sam kiley. he was on the ground until just yesterday morning among the journalists taking out of the country in part because of safety concerns. sam, this was the concern and the sad fact is the pentagon now confirming such an attack. reporter: yeah, the situation on kabul international airport for several days until i left yesterday evening, in fact, jim, was extremely tense. because they did have this very active ongoing intelligence with some precision. this he were anticipating a spectacular attack. they were anticipating an attack almost certainly against the crowds gathering outside of the gate. and they anticipated that it
0 casualties are unclear at this time. we will provide additional details when we can. we also learned moments ago that president biden has been briefed on that explosion outside of kabul airport. a white house official tells cnn. and we are waiting on a pentagon press briefing which will happen in about 30 minutes from now. the back ground on this, as you look at a live picture from the kabul airport, that in recent days and yesterday we reported the u.s. has been very concerned about a credible threat stream about potential terror attacks targeting the gates to the airport and the crowds around those gates. the u.s. believing that terror groups had both the capability and the planning to carry out such attacks. there is still no attribution for these attacks or as we said, any confirmation about casualties. we have our reporters covering the story. let s begin with nick paton walsh in doha. we see now a confirmed attack. only the families of the u.s. serve men concerned about who