attacks. >> reporter: bombings targeted many who were trying this vein to get into kabul airport and get on one of the last evacuation flights. the taliban pledged to punish those behind it. the blasts were just outside an gi abbey gate and near a hotel occupied until recently by british forces. it is an area packed for days with afghans wading through sewage canals, those conditions would surely have amplified the explosion. american officials have been working with potential attacks for days. wednesday they stepped up the alarm talking about a very specific threat stream and about planned attack on crowds outside the airport. americans were killed when in close contact screening and searching evacuees at the gate. >> isis will not deter us from