into the isis-k attack. the pentagon released new photos and video from the karzai international airport days of the attack and leading up to the attack. with this report is courtney kube. is it a good thing or bad thing that they figured out this was not a complex attack? what does that say about our security measures? >> so what it proves is there was a lot of reports in the days afterwards, there was gunfire going back and forth. somewhere between the afghan crowd and somewhere from the u.s. coalition side, and that could have caused more deaths than the huge blast there. there were a number of warning shots fired but they are not believed to have caused injury or deaths here.