In the two decades since reunification, Berlin has been an enormous building site, but empty Spaces still litter the city center.

两德统一后的二十年中，柏林新建了大片的建筑，但在市中心仍有荒废的空地。

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Standing on the roof of Two World Financial Center, amid mounds of debris that still litter the streets and rooftops around the World Trade Center, New York police officers -- among them former Marines -- raised the flags of the United States, Marines, Navy, Army, Air Force and Coast Guard.

CNN: Marines honor fallen members of armed forces