9/11 before and after

This combo image shows two documentations of the September 11, 2001, terrorist attack in New York City and the current day location. In Top Smoke rises into the sky following the collapse of World Trade Center Towers Tuesday, Sept. 11, 2001 in New York. Below the skyscraper known as One World Trade Center, right, rises in lower Manhattan, Aug. 10, 2011 in New York.

Top the World Trade Center destruction is shown in the aftermath of the Sept. 11 attacks in New York on Sept. 30, 2001.

The tower known as Four World Trade Center is under construction in lower Manhattan, Aug. 9, 2011 in New York.

Firefighters work beneath the destroyed mullions, the vertical struts which once faced the soaring outer walls.

The tower known as Four World Trade Center is under construction.

People run from the area of the World Trade Center as the center's south tower collapses.

The skyscraper known as One World Trade Center, center, is under construction in lower Manhattan, Aug. 4, 2011.
People covered in dust walk over debris near the World Trade Center in New York.

People walk near the World Trade Center in lower Manhattan, Aug. 8, 2011 in New York.

New Yorkers walk over the Brooklyn Bridge on their way to work on April 7, 1980, during the transit strike.

People flee the scene of the attacks on the World Trade center on September 11, 2001.

Broadway near ground zero on the evening of September 11, 2001 after the September 11 terrorist attacks on the World Trade Center in New York City.

People pass a McDonald's restaurant on Broadway in lower Manhattan, Aug. 4, 2011.

Emergency workers at ground zero on Sept. 11, 2001 after the terrorist attacks on the World Trade Center in New York City.

People walk along Church Street past Century 21 clothing store in lower Manhattan, Aug. 4, 2011.

A destroyed subway station near ground zero on the evening of Sept. 12, 2001 after the September 11 terrorist attacks on the World Trade Center in New York City.

People walk along Church Street in lower Manhattan, Aug. 4, 2011.