The Liberty Sun, a U.S.-flagged cargo ship bound for Mombasa, Kenya, was attacked Tuesday night by Somali pirates, according to the company and senior U.S. military officials. "The pirates fired rocket-propelled grenades and automatic weapons at the vessel, which sustained damage," said a statement from New York-based Liberty Maritime Corporation, which owns the vessel. ... The pirates never made it onto the ship and the vessel is now being escorted by a coalition ship, still bound for Mombasa, officials said.