Building collapse in lower Manhattan

Emergency crews with a dog sift through the rubble of a collapsed building at 71 Reade St. in New York City. The vacant building had recently been cited for loose bricks and cracks.  (Chris McGrath / Getty Images)

Firefighters probe the debris left after a New York City building collapse. Officials said it appeared the front half of the building was sheared off in the collapse, and interior floors were visible from the street.  (Chris McGrath / Getty Images)

New York City firefighters get an aerial view of the scene after a vacant building collapsed about seven blocks north of the World Trade Center site. Emergency crews searched the site and a neighboring building as a precaution.  (Edouard H.R.Gluck / Associated Press)

Firefighters using thermal cameras search through the rubble of a collapsed abandoned building on Reade Street in New York City.  (Chris McGrath / Getty Images)

What used to be the interior of a vacant five-story New York City building is exposed after part of the structure collapsed. Some work was being done to shore up the building, which is next door to a construction site.  (Edouard H.R.Gluck / Associated Press)