I'd love to know how many people in the HSD or the White House commute by train to work each day. I'm betting not that many if it takes a bombing in Madrid to make everyone suddenly wary of rail travel. Walk through Penn or Grand Central or Union Station and imagine that which shouldn't be imagined. Then multiply it by 10,000 smaller stations across this country and imagine the impact just one attack like Madrid would have here. Someone needs to come up with something better than "look for unattended bags."