KYIV, Ukraine (AP) — The U.S. has lifted a ban on providing American weapons and training to a controversial Ukrainian military unit that was key to the defense of the major port city of Mariupol, the State Department said on Tuesday. The Azov Brigade is among Ukraine’s most effective and popular fighting units but it has been dogged by its origins as a volunteer battalion that drew fighters from far-right circles and criticism for some of its tactics. The U.S. had banned the regiment from using American weapons, citing the neo-Nazi ideology of some of its founders. The current members...