Nevada Test Site
Overview
 
The Nevada National Security Site (N2S2), previously the Nevada Test Site (NTS), is a United States Department of Energy
United States Department of Energy
The United States Department of Energy is a Cabinet-level department of the United States government concerned with the United States' policies regarding energy and safety in handling nuclear material...

 reservation located in southeastern Nye County, Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

, about 65 mi (104.6 km) northwest of the city of Las Vegas
Las Vegas, Nevada
Las Vegas is the most populous city in the U.S. state of Nevada and is also the county seat of Clark County, Nevada. Las Vegas is an internationally renowned major resort city for gambling, shopping, and fine dining. The city bills itself as The Entertainment Capital of the World, and is famous...

. Formerly known as the Nevada Proving Grounds, the site, established on 11 January 1951, for the testing of nuclear devices, is composed of approximately 1360 sq mi (3,522.4 km²) of desert and mountainous terrain.
 
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