Question: Operation Roller Coaster was a series of nuclear tests conducted at a reservation located in what county?

Related documents: [0]  [DOC] Operation Roller Coaster was a series of 4 nuclear tests conducted by the United States in 1963 at the Nevada Test Site. These tests followed the "Operation Storax" series and preceded the "Operation Niblick" series. [END] 
[1]  [DOC] The Nevada National Security Site (N2S2),(though the abbreviation NNSS is still used), previously the Nevada Test Site (NTS), is a United States Department of Energy reservation located in southeastern Nye County, Nevada, about 65 miles (105 km) northwest of the city of Las Vegas. Formerly known as the Nevada Proving Grounds, the site was established on 11 January 1951 for the testing of nuclear devices, covering approximately 1,360 square miles (3,500 km) of desert and mountainous terrain. Nuclear weapons testing at the Nevada Test Site began with a 1-kiloton-of-TNT (4.2 TJ) bomb dropped on Frenchman Flat on 27 January 1951. Many of the iconic images of the nuclear era come from the NTS. NNSS is operated by National Security Technologies, LLC, a joint venture of Northrop Grumman, AECOM, CH2M Hill, and Babcock & Wilcox. [END]  
Answer: Nye County
Nye County