"When I hear this coming from Dick Cheney, who was a coward, who would not serve during the Vietnam War, it makes my blood boil," Harkin said. "Those of us who served and those of us who went in the military don't like it when someone like a Dick Cheney comes out and he wants to be tough. Yeah, he'll be tough. He'll be tough with somebody else's blood, somebody else's kids. But not when it was his turn to go."