Vice President Dick Cheney apparently broke the No. 1 rule of hunting: be sure of what you're shooting at. Cheney wounded fellow hunter Harry Whittington in the face, neck and chest Saturday, apparently because he didn't see Whittington approaching as he fired on a covey of quail in Texas. Hunting safety experts interviewed Monday agreed it would have been a good idea for Whittington to announce himself - something he apparently didn't do, according to a witness. But they stressed that the shooter is responsible for knowing his surroundings and avoiding hitting other people.