president is being updated on constantly throughout the day and something that he's very concerned about. and it is eerie almost the extent to which the warnings are so similar to what we heard from the president and white house officials in the days leading up to yesterday's terrorist attack. and so obviously there is a sense of heightened concern. and again john kirby saying we're prepared and would expect future attacks. >> i think he said something about the specific threat is that they are picking up on the the intelligent. jeremy, thank you so much. general, appreciate it. nick paton walsh, thank you very much. here is the latest understanding of how the attack played out at the kabul airport. and again as we just heard in the pentagon briefing there is a lot that they still don't know. according to the head of u.s. central command, an isis attacker wearing a suicide vest apparently passed first through a taliban checkpoint and then gained access to the airport gate manned by u.s. service members when detonating the vest. and i want to show you video,