Wikipedia: USS Iowa fires her caliber guns on 15 August 1984 during a firepower demonstration after her modernization. Last lead ship of any class of US battleship. On display at the Pacific Battleship Center at the Port of Los Angeles.
I don't think that back blast area was clear. A Soldier with the Airborne Division Fires an to Dramatic Effect While Fending off a Taliban Attack on Combat Outpost Nolen in the Arghandab Valley, Afghanistan.