Sep 22, 2009 7:32 AM by Associated Press
There's a reminder from federal officials that rail and transit systems can be vulnerable to terrorist attacks. The reminder is being sent out to law enforcement around the country.
The FBI and the Homeland Security Department warn that improvised explosive devices are the most common method used to blow up mass transit and rail systems overseas. Officials are recommending that transit system security officials conduct random sweeps at terminals and stations, and that police make random patrols and board some trains and buses.
Officials have said privately that the investigators who searched some New York City apartments earlier this month were worried about the possible use of backpack bombs on New York City mass transit trains.
An airport shuttle driver in Colorado who had visited New York is in custody on a charge of lying to the government.