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Smoke pours through cracks in old building in Philadelphia

Matt Rourke / AP

Smoke escapes as firefighters battle a four-alarm fire in an abandoned school building Wednesday, Aug. 3, 2011, in Philadelphia. The fire in the former Edison High School, also the former Julio De Burgos Middle School, was first reported just after 1:30 p.m. Wednesday, and was reportedly brought under control just after 3:30 p.m.

Matt Rourke / AP

A police officer looks on as firefighters battle a four-alarm fire in an abandoned school building Wednesday, Aug. 3, 2011, in Philadelphia.

The photographer noticed an interesting detail in the top image. Full story.