Jan. 13 (UPI) -- Train riders in 20 cities around the globe shed their trousers for the annual No Pants Subway Ride.
The event, first organized in 2002 by performance group Improv Everywhere, featured hundreds of people riding commuter trains in their underwear Sunday in cities including Chicago, Boston, Berlin, Calgary, Dallas, Mexico City, Tokyo, London, Lisbon, Los Angeles, St. Peterburg, Melbourne and San Francisco.