Iran says a drill involved the launching of four missiles . The U.S. military says these exercises are strictly `` defensive , '' but the show of force in light of Iran 's threats to mine the Strait of Hormuz is hard to ignore . The missiles hit and sank a target the size of a warship , Iran says . The test comes as the United States and others conduct minesweeping exercise .
Iran says a drill involved the launching of four missiles . The missiles hit and sank a target the size of a warship , Iran says . The test comes as the United States and others conduct minesweeping exercise .