The McKinley Climatic Laboratory is both an active laboratory and a historic site located in Building 440 on Eglin Air Force Base, Florida. The laboratory is part of the 96th Test Wing. In addition to Air Force testing, it can be used by other US government agencies and private industry. On October 6, 1997, it was added to the U.S. National Register of Historic Places. The laboratory was named a National Historic Mechanical Engineering Landmark by the American Society of Mechanical Engineers in 1987.