NEW : Caleb Moore brother also suffered an accident in the X Games . Caleb Moore 's died Thursday after a snowmobile crash in the Winter X Games . The crash has raised new safety concerns about the games . R.I.P , which operates the X Games , says it will conduct a thorough review .
NEW : Caleb Moore 's brother also suffered an accident in the X Games . Caleb Moore died a week after a snowmobile crash in the X Games . The crash has raised new safety concerns about the games . ESPN , which operates the X Games , says it will conduct a thorough review .