after another siege at the same airport claimed more than 30 lives. the pakistani taliban taking responsibility. saima mohsin joining us now on the phone from the airport in karachi. saima, explain to us, this is still an active scene, isn't it? >> reporter: it is, christine. this is very much under way right now. we've seen sirens blaring, rushing past us, both paramilitary troops, the rangers here in karachi in pakistan. we've seen the police. we've seen dozens of vehicles and ambulances. we counted at least 30 ambulances coming through. they were rushing towards the airport security force academy, which is right next to karachi airport. they are the very people, the force that first confronted those ten militants that attacked karachi airport at terminal 1, an older terminal, overnight sunday here in karachi. they themselves may well be now