Dome

Building at base with angled roof struts that echo the ones on the tower; guy wires to the tower visible; In 1996, a $29 million, 277-foot-tall (84 m) air traffic control tower was built near the Theme Building. (To the east of the old 1960s tower which still exists, and is used for offices.) The windows, tilted outward to avoid glare, circle the entire top floor to allow a clear view for air traffic controllers. Holmes & Narver, a subsidiary of Ashland Oil since 1981, is a major government contractor, as a construction and engineering firm. The control tower also contains an array of equipment such as radios, radar displays, computer systems for meteorological information and flight data, controllers' headsets, telephone systems, light guns for communication with aircraft via aviation light signals, and wind and pressure gauges. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 8/31/2015)