"Gunny" Joe Simpson has little time to waste on battlefield pundits who are criticizing the war effort safe from TV studios inside Washington's Beltway. "I'm not political, but that sounds like liberals talking," fumed Bravo Company's hard-as- nails gunnery sergeant, spitting on the ground and taking a puff at his stogie. "The Marines are a light force. That enables us to travel fast. The initial shock force has worked. We crossed into Iraq and gave Saddam Hussein no time to adjust. He has only retreated. "What are we now, right here, [50 miles] or less from the heart of Baghdad?...