The merger of architecture and structural engineering has been SOM’s hallmark for decades. From the glass and steel facade of Lever House, completed in 1952 as the first modernist office building in New York City; to the record-breaking skyscrapers, Sears Tower and John Hancock Center, which redefined the Chicago skyline in the 1970s; to the cantilevered trusses of San Francisco International Airport, opening a gateway to the city for the new millennium; and the engineering of Burj Khalifa, which stands as the world’s tallest building, SOM continues to innovate.