Northeast Mass Transit Targeted?

According to this report that expands on yesterdays warning:

"The threat is serious, the threat is significant, and it is plausible," said Congressman Peter King, R-Long Island, a member of the House Homeland Security Committee.

Uniformed officers, including this NYPD Counter Terrorism Squad members and Amtrak cops with M-16s, flooded Penn Station Wednesday after the FBI said it had received a "plausible but unsubstantiated" report that Al Qaeda operatives discussed a plan two months ago to bomb New York City's mass transit system.

The report said: "These discussions reportedly involved the use of suicide bombers or explosives placed on subway/passenger rail systems."

Sources told CBS 2 HD the plot involved the Long Island Rail Road. If the explosion went off in Penn Station, the source said, it would affect transportation of Amtrak's northeast corridor between Boston and Washington, LIRR service and New York City subway service.

Rep. King is a serious guy unlike say, Sen. Charles Shumer who's nothing but a camera whore. If he said the threat is plausible I have to believe it is and not just another unsubstantiated threat.

I'm a strong believer that the next attack will target infrastructure and hit us economically, which we can't afford at this point. Al-Qaeda's MO is hitting transportation as they did in Spain and London.