On Chicago's Roof

On The Willis Tower Roof With Skyscraper's Electricians
CHICAGO - MARCH 12: The Sears Tower rises above the skyline on March 12, 2009 in Chicago, Illinois. The building will be changing its name to the Willis Tower after London-based insurance broker Willis Group Holdings moves into the building. The building, once the tallest in the world, was built in the 1970s to house the offices of the then largest retailer in the world Sears, Roebuck & Co. (Photo by Scott Olson/Getty Images)
CHICAGO - MARCH 12: The Sears Tower rises above the skyline on March 12, 2009 in Chicago, Illinois. The building will be changing its name to the Willis Tower after London-based insurance broker Willis Group Holdings moves into the building. The building, once the tallest in the world, was built in the 1970s to house the offices of the then largest retailer in the world Sears, Roebuck & Co. (Photo by Scott Olson/Getty Images)

Changing a lightbulb in your own place is one thing. Try doing it 1,500 feet in the sky while standing on the roof of the tallest building in North America with only your own balance and wits keeping you on solid ground.

It's all in a day's work for Willis Tower electricians John Barker and Mike Hlavacek.

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