Baltimore/Washington International Thurgood Marshall Airport windows being replaced (PHOTOS)

Construction crews at Baltimore/Washington International Thurgood Marshall Airport are working to replace large windows in the Airport’s air traffic control tower—replacing the existing windows that are almost 30 years old. Each of the new windows weighs approximately 850 pounds. The windows are about 106 inches wide at the top, 98 inches wide at the bottom, and 99 inches high.

See photos:  http://www.wjla.com