In this Wednesday, Feb. 6, 2013 photo, vehicles move thought the main gate at the Navy yard in Philadelphia. The city's Navy Yard is celebrating a milestone that skeptics might not have believed 15 years ago. Nearly all naval operations are long gone from the sprawling former shipyard but 10,000 people now work there in an eclectic mix of businesses from fashion to pharmacies. That number is expected to triple in 20 years. (AP Photo/Matt Rourke)
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