ivan, a kurdish official warning of po ten tial genocide. what have you learned? >> well, i'm standing on the tarmac of a helicopter landing pad, and we accompanied a helicopter from the iraqi air force and several peshmerga fighters on board on a dangerous chaotic and, dare i said, heroic mission, to deliver aid to some of those people, those acyazidi who have been trapped on mt. sinjar for the better part of a week and to evacuate some from that mountain. we took off from here on this aging helicopter that was loaded down with baby diapers, with condensed milk, with food and water and, in some cases, even boxes of shoes to give people. and as we flew over the plain in the direction of mt. sinjar and went over the isis positions, the two machine gunners on the side of the aircraft began opening fire on suspected targets below. they told me every time they fly in and out on these missions, they take fire from down below. i saw them go through cartridges and cartridges. entire machine gun belts of ammuniti ammunition. they got over mt. sinjar. it's this incredible