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Iconic Chicago tower thrives on friendly security

June 4, 2013Amy Canfield

CHICAGO—At 110 stories, 1,450 feet tall and 4.5 million square feet, the Willis Tower is an architectural icon in the United States. Formerly known as the Sears Tower, the building's area is equal to about 100 football fields or 17 Chicago city blocks if laid out flat. It truly is a vertical “city within a city,” as its promotions attest.In its majesty it is also a potential terrorist target, said Keith Kambic, director of security and life safety for the tower.The Willis Tower...

Keith Kambic, Sears Tower, Security Systems News (SSN), Willis Tower