The changing story of Eddie Gallagher and death in Iraq

Three years ago, members of the Alpha Platoon did something unthinkable. They broke the “norm of silence” and accused the once-respected chief of the Navy Seal, Eddie Gallagher, for war crimes in Iraq. Gallagher will be acquitted of killing a young ISIS prisoner, but the controversy over what happened in Mosul is not over. CBS News National Security Correspondent David Martin reports.