A rapid population expansion occurred just after the turn of the 20th century, when Sydney became home to one of North America's main steel mills. During both the First and Second World Wars, it was a major staging area for England-bound convoys. The post-war period witnessed a major decline in the number of people employed at the Dominion Steel and Coal Corporation steel mill, and the Nova Scotia and Canadian governments had to nationalize it in 1967 to save the region's biggest employer, forming the new crown corporation called the Sydney Steel Corporation. The city's population has steadily decreased since the early 1970s due to the plant's fortunes, and SYSCO was finally closed in 2001. Today, the main industries are in customer support call centres and tourism. Together with Sydney Mines, North Sydney, New Waterford, and Glace Bay, Sydney forms the region traditionally referred to as Industrial Cape Breton.