CHICAGO, IL - OCT. 6: Hancock building closeup on October 6, 2011 in Chicago, Illinois. It was constructed in 1968 with 100-story as the fifth-tallest building in the world as pinnacle height.
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CHICAGO, IL - OCT. 6: Hancock building closeup on October 6, 2011 in Chicago, Illinois. It was constructed in 1968 with 100-story as the fifth-tallest building in the world as pinnacle height.