The U.S began in investigation looking into an overnight missile attack from Yemen on a group of warships stationed in the Red Sea. What exactly caused the missile attack is yet to be known. The attacks are believed to have been sent from rebel-held territory Bab el-Mandeb. In retaliation to the two missile attacks, the U.S shot back with Tomahawk missiles. The U.S was informed by the attack because the missile strike was caught on radar. The USS Mason was the destroyer that was attacked.