This subcategory is for sites specific to the 36th state in the Union (1864), Nevada-- today one of the fastest-growing. states in the Sunbelt. Mostly desert land, the US government and military control over 85% of Nevada's 286,299 sq km. American interest in Nevada first came with the discovery of the Comstock Lode, a vein of silver, in 1858. Mining, ranching, and government continue to play a heavy role in the economy, though in the late 20th century it is increasingly led by high technology and tourism to the gambling and resort centers around Las Vegas and Reno.