http://cbs11tv.com/national/machine.guns.subway.2....
It's a first for mass transit in the United States. NYPD officers, armed with rifles, submachine guns, body armor and bomb sniffing dogs will begin patrolling the city's subway system thanks to a 50 percent increase in a homeland security grant.
Similarly equipped NYPD units, known as "Hercules Teams," have patrolled Wall Street, the Empire State building and other aboveground city landmarks for years as a response to the World Trade Center attacks.