On 6 January 2008, five Iranian patrol boats crewed by the Revolutionary Guard approached three United States Navy warships in the Strait of Hormuz: the cruiser USS Port Royal, the destroyer USS Hopper and the frigate USS Ingraham. In a compilation of video and audio released by the Pentagon of the most provocative moments of the encounter, the radio officer of the USS Hopper is seen and heard attempting to make radio contact with the Iranian vessels. A few moments later, another voice radioed the USS Hopper saying, "I am coming at you.