Associated PressThe U.S. military said Sunday that its forces opened fire on Houthi rebels after they attacked a cargo ship in the Red Sea, killing several of them in an escalation of the maritime conflict linked to the war in Gaza. “We're going to act in a self-defense going forward,” a White House official said. In a series of statements, the U.S. Central Command said the crew of the USS Gravely destroyer first shot down two anti-ship ballistic missiles fired at the Singapore-flagged Maersk Hangzhou late Saturday, after the vessel reported getting hit by a missile earlier that evening as it sailed through the Southern Red Sea.