U.S. troops kept Afghan body parts as trophies

The investigation by Rolling Stone also revealed how:
Troops shot dead civilians and tried to cover their tracks;
U.S. soldiers hacked off part of a dead man's skull;
Soldiers cheered as they filmed a U.S. airstrike blowing up two Afghan civilians; A video showed two Afghans on a motorcycle being gunned down.
The magazine claims the men hacked off bits of skull from their victims and kept them as trophies of their kills.
The soldiers are also accused of opening fire on civilians for no reason and covering up their attacks by planting guns and magazine on their victims.