A Justice Department legal opinion released Tuesday disavowed a 1938 determination that monuments created by previous presidents under the Antiquities Act can't be revoked.

A Justice Department legal opinion released Tuesday disavowed a 1938 determination that monuments created by previous presidents under the Antiquities Act can't be revoked.

If presidents can establish a national monument under the Antiquities Act, they can also remove them, Justice Dept. says in a blueprint for action.