> TSA screening in trains make much less sense than in planes. First, planes have a history of hijackings Not to mention that the most important measures prote

> TSA screening in trains make much less sense than in planes. First, planes have a history of hijackings Not to mention that the most important measures protecting against this have nothing to do with the TSA. 9/11 Changed completely the way passengers and crew see hijacking. It used to be that hijackers had demands, not suicide missions. Anyone trying to do it now will face a planeful of people fighting them like their lives depend on it, not to mention a locked, reinforced cockpit door. Attacks on planes are stopped either before they ever make it the airport, as with the plot that made them ban liquids, or after they're in the air, as with the undewear- and shoe-bombers.