Yellowknife and town hall. The first mayor of Yellowknife was Jock McNiven. In September 1967, Yellowknife officially became the capital of the Northwest Territories. This important new status sparked what has been coined as the third boom in Yellowknife. New sub-divisions were established to house an influx of government workers. In 1978 the Soviet nuclear-powered satellite Kosmos 954 crashed to Earth near Yellowknife. There were no known casualties, although a small quantity of radioactive nuclear fuel was released into the environment, and Operation Morning Light—an attempt to retrieve it—was only partially successful. A new mining rush and fourth building boom for
Legislative Assembly of the Northwest Territories served as a residence for the Lieutenant Governor. In 1883 the Assembly moved to Regina. The Territorial Administration building was built to accommodate the growing Assembly and used until 1905. After the creation of Alberta and Saskatchewan, the capital was moved to Ottawa and the council sessions took place in an office building on Sparks Street. When the council sessions returned to the territories, they were held in any infrastructure suitable as they traveled from community to community. After the capital was moved to Yellowknife in 1967 a temporary site for the Legislative Assembly was used until the new Legislature