premise: In an incident that dominated news coverage the military lost 2 helicopters full of servicemen and video surfaced of a US soldier 's body being abused by enemies . 
hypothesis: In the course of a long night , two Black Hawk helicopters were shot down , 73 Americans were wounded , 18 were killed , and the world 's television screens showed images of an American corpse dragged through the streets by exultant Somalis .