then, the pentagon says, armed combatants appeared on the scene. at least two of the fighters were killed by a u.s. helicopter gunship. >> there were clear indications te anoer u. as hostilenten helicopter had mechanical problems and was deemed too dangerous to fly out of the area, so it was detonated and the ground and destroyed. thmpnds it helped eight of them children, who local rescue groups later helped load into ambulances. >> this is a man that we should all be happy is no longer walking on the face of the earth. >> and martha rad datdatz repori this out all day long. we know this was all calculated, moving in instead of dropping bombs on the hideout? >> reporter: exactly, david. civilian casual tills are more likely with missile or drone strikes and the pentagon has already been under intense scrutiny after that disastrous drone strike in afghanistan that