it's time to #bringbackour gigi. let's bring our own isha sesay. just as help from the u.s. is arriving, it seems like finding all of these girls got a lot harder. >> reporter: absolutely, jake. there is no doubt about it. a senior u.s. official telling cnn that u.s. intelligence believes that the girls could have been broken up into smaller groups, according to some reports of seven or eight. and i want to put this information into context for our viewers. you have to understand that the borders with neighboring countries in that region, in the northeast, which is where this attack took place, it's extremely pourous. it's very easy to slip back and forth and move these girls out of nigeria into one of these places. i was speaking with someone who mediated on behalf of the government about this issue and moving the girls. could they be here or elsewhere? he made a very interesting point to me that i think is worth putting out there. accordi ahe belongs to ethnic group and his point is they could have moved these girls to those places because they are supported of shekau, sup