Louvre Pyramid of . Its square base has sides of and a base surface area of . It consists of 603 rhombus-shaped and 70 triangular glass segments. The pyramid structure was engineered by Nicolet Chartrand Knoll Ltd. of Montreal (Pyramid Structure / Design Consultant) and Rice Francis Ritchie of Paris (Pyramid Structure / Construction Phase). The pyramid and the underground lobby beneath it were created because of a series of problems with the Louvre's original main entrance, which could no longer handle the enormous number of visitors on an everyday basis. Visitors entering through the pyramid descend into the spacious lobby then
Structure of the Royal Air Force in 1989 Structure of the Royal Air Force in 1989 At the end of the Cold War in 1989 the Royal Air Force structure was as follows: The Chief of the Air Staff was a Marshal of the Royal Air Force, who commanded the Royal Air Force. He was a member of the Chiefs of Staff Committee, the Defence Council, and the Air Force Board, which administered the Royal Air Force. The following position were part of the Air Force Board: The strength of the Royal Air Force in 1989 was 93,300 men. RAF Strike Command commanded all operational Royal Air Force