The destroyer Mahan opened fire on four Iranian patrol boats that were harassing the ship while underway Jan. 8 in the Straits of Hormuz. The Washington Post reported that Mahan fired three warning shots from its .50-caliber machine gun across the bows of the Iranian vessels, when one of them came within 900 feet of the ship. The incident is the first of its kind to happen in months, a Navy spokesman told the Post.