nbc's kristen well kearse at the white house and nbc news foreign news correspondent richard engel is in cairo. what's the latest there. >> reporter: i'm still struck by that map you showed. so much yellow. this is an unbelievable crackdown that is taking place, the embassy here and in so many countries closed down, consulates, as well, about 22 of them. here in cairo today, nothing special, the embassy just had security personnel. we have learned a little bit more talking to sources about this specific terror threat. it does go back to yemen. it goes back to al qaeda in the arabian peninsula, which is the al qaeda group based in yemen and in saudi arabia. and we were told that the threat is specifically both in timing, the timing around now and in location focused on yemen. but because of developments recently within al qaeda in the arabian peninsula the threat was expanded to other embassies, other consulates and this global travel alert. what has happened is midlast month, the deputy commander of al qaeda in the arabian peninsula was killed in a drone attack so that group, which is