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In page Sling (weapon):

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Traditional slinging is still practiced as it always has been in the Balearic Islands,[citation needed] and competitions and leagues are common. In the rest of the world, the sling is primarily a hobby weapon, and a growing number of people make and practice with them. In recent years 'slingfests' have been held in Wyoming, USA, in September 2007 and in Staffordshire, England, in June 2008.[citation needed]