In U.S. rail networks still vulnerable to terror attacks - must read

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Expense biggest hurdle to preventing London-style attacks

“It’s about as vulnerable as it always has been,” said Juliette Kayyem, a terrorism expert at Harvard University. What has been done, she added, is “pretty piecemeal — not part of any comprehensive effort.”

Homeland security experts say that improving commuter rail security is difficult and EXPENSIVE due to the very nature of the rail systems. And absent any terrorist attack in the United States in over three years, there is little public pressure on Congress to come up with solutions.
http://www.msnbc.msn.com/id/7069390/

So it seems it will take attacks as we've seen in London today before our government makes improvements to the US. rail system - in other words, perhaps 40 or several hundred will have to die before the Bush government decide to improve homeland security!