"No Pants Subway Ride" held in NYC

NEW YORK, Jan. 11, 2016 -- Participants dance in their underwear inside the Union Square subway station during the annual "No Pants Subway Ride" in New York, the United States, Jan. 10, 2016. The event is organized by Improv Everywhere, this self described "prank collective", which draws thousands of participants in New York City and around the world. (Xinhua/Li Muzi)