Museum of Science and Industry (Chicago) of Progress event. For years, visitors entered the museum through its original main entrance, but that entrance became no longer large enough to handle an increasing volume of visitors. The newer main entrance is a structure detached from the main museum building, through which visitors descend into an underground area and re-ascend into the main building, similar to the Louvre Pyramid. In 1983, due to increased attendance, the museum started construction of its underground parking lot, located in three underground levels below the front lawn. Construction of the underground parking lot was finished in the 1990s. For over 55 years,
Structure of the Royal Navy in 1989 Structure of the Royal Navy in 1989 At the end of the Cold War in 1989 the Royal Navy structure was as follows: The First Sea Lord was an Admiral of the Fleet who commanded Her Majesty's Naval Service. He was a member of the Chiefs of Staff Committee, the Defence Council, the Admiralty Board and the Navy Board. The First Sea Lord was based in Whitehall, London and had the following officers supporting him: The Naval Service consisted of the following components The strength of the Royal Navy in 1989 was 65,500 men. "Jane's Fighting Ships 1989-1990" gives the