VIDEO: NYC Holds Annual No Pants Subway Ride

Sunday marked the 18th annual New York City's No Pants Subway Ride.  The frigid weather were no deterrent to those taking part in the annual event, in which participants ride the subway without their pants on.  The event is organized by the group Improv Everywhere, who started it as a prank in the New York City subway in 2002.  The No Pants Subway Ride has now spread to 60 other cities.