horribly wrong. a plane from the u.s. backed saudi led coalition struck a bus carrying them. dozens died. some of the bodies were so mu mutilat mutilated identification became all but impossible. this was a direct hit in the busy of a busy market. >> translator: i saw the bomb hit the bus. it blew it into those shops and three bodies clear through the other side of those buildings. we found bodies scattered everywhere. there was a severed head inside the bomb crater. >> reporter: this video was shot in the aftermath of the attack and sent to cnn. a cameraman working for cnn subsequently filmed these images for us. munitions experts tell cnn this was a u.s. marked k 82 bomb