DC Launches Mass Transit Terror Drill Metro will be scene of simulated mass-casualty attacks By Rob Quinn, Newser Staff Posted Feb 2, 2010 2:52 AM CST 1 comment Comments A sign that reads 'Security Alert' is on display as Metro Rail riders depart a subway station in Washington, DC. (Getty Images) (Newser) – Commuters at one of Washington Metro's busiest stations are being met today by dozens of transit police officers and bomb specialists as part of the system's biggest-ever security drill. "There is no immediate or credible threat" to the Metro, a spokeswoman tells the Washington Post. "We want to stay a step ahead." Today's operation will be followed by a series of drills in the coming weeks simulating mass-casualty attacks like the one on the London Underground in 2005 and in Mumbai in 2008. The Metro's newly beefed-up security teams include a 20-member anti-terrorism unit formed in January that conducts random patrols. "We want to be unpredictable and keep people off guard," said a transit police chief.