New York, Ground Zero: Thick cloud of smoke raising up from where the Twin Towers of the World Trade Center used to stand. The twin towers collapsed shortly after the terrorist attack on early Tuesday morning. September 12, 2001. Please byline: Alecsey Boldeskul/NY Photo Press. ..*PAY-PER-USE* ....NY Photo Press: ..phone (646) 267-6913; ..e-mail: info@nyphotopress.com