Alice Springs has a large population. This population is generally composed of foreign and Australian tourists, Aboriginal Australians visiting from nearby Central Australian communities, and Australian or international workers on short-term contracts (colloquially referred to as "blow-ins"). The major sources of work that recruit workers into town are the stations, mines, healthcare and law enforcement. Foreign tourists usually pass through on their way to Uluru-Kata Tjuta National Park, whilst Australian tourists usually come through as a part of an event such as the Masters Games and the Finke Desert Race. These events can cause the population of the town to fluctuate by several thousand within a matter of days.