Some stories just don't have happy endings. But we Americans suffer from an optimism others interpret asnaivaté. Maybe that's why we sit in front of our TV sets gazing mindlessly at horrific video images looped by cable news outlets. Maybe we believe if we watch the space shuttle replay enough times it will race into the heavens instead of violently crashing to earth. Or maybe, just maybe, the second plane will miss the South Tower on the one hundredth viewing of that grim video clip on Sep...