This is an american film about the Vietnam war. It's probably around mid 1980s. I didnt see the entire thing, but I remember one scene. A group of US soldiers are going through a Vietnamese village. At some point, one soldier drops a grenade. A little girl picks it up and shows it to a group of soldiers. One soldier tries to get it away from the little girl. She refuses. There6a bit of a struggle. The grenade ends up going off as the camera cuts to the other soldiers. The camera cuts back and you the see the soldier and little girl floating face down in a pool of water.