Since 1982, Music in the Mountains has been a summer classical music festival that takes place in Nevada County, California.
 The current music director is Hungarian conductor, Gregory Vajda.
 Concerts take place in Grass Valley and Nevada City.
Graniteville (previously: Eureka and unofficially Eureka South) is a small, unincorporated community and census-designated place (CDP) located in Nevada County, California, United States.
The town sits on the San Juan ridge separating the Middle and South Forks of the Yuba River, approximately 26 miles (42 km) northeast of Nevada City.
 The elevation of Graniteville is 4977 ft above sea level.
Gary Goldschneider (born 22 May 1939) is a writer, pianist and composer.
 Goldschneider has performed several "marathon" piano pieces, such as playing all 32 of Beethoven's sonatas in one sitting.
 On another occasion in Nevada City, California, in 1984, he performed all of Mozart's sonatas in one sitting, only taking three breaks to consume water.
 This took approximately six hours.
The Texel Disaster took place off the Dutch coast on the night of 31 August 1940 and involved the sinking of two Royal Navy destroyers, and damage to a third and a light cruiser.
 The disaster was caused by a destroyer flotilla running into an unmarked minefield, which caused serious damage to one vessel; two more destroyers were sunk going to the aid of the first, and a light cruiser sent as an escort was slightly damaged by a mine on the return journey.
 In all, the disaster caused approximately 300 deaths, with a further 100 men injured or taken prisoner of war.
Camptonville (formerly, Comptonville and Gold Ridge) is a small town and census-designated place (CDP) located in northeastern Yuba County, California.
 The town is located 36 mi northeast of Marysville, off Highway 49 between Downieville and Nevada City.
 It is located on a ridge between the North Fork and Middle Fork of the Yuba River, not far from New Bullards Bar Dam Reservoir.
 Camptonville lies at an elevation of 2825 feet (861 m).
 The population was 158 at the 2010 census.
Ammonium perchlorate ("AP") is an inorganic compound with the formula NHClO.
 It is a colorless or white solid that is soluble in water.
 Perchlorate is a powerful oxidizer and ammonium is a good fuel.
 This combination explains the usefulness of this material as a rocket propellant.
 Its instability has involved it in a number of accidents, such as the PEPCON disaster.
The For-Site Foundation, established in 2003, is a non-profit organization dedicated to the creation of collaborative art about place.
 Based in both San Francisco and Nevada City, California, For-Site collaborates with artists and national parks to create site-specific works of all media.
 For-Site’s work includes site-specific projects done at thought-provoking and usually inaccessible sites in the bay area, including Alcatraz and the Presidio, and a residency program and educational partnerships that both take place on their 50-acre site in Nevada City.
 Curator Cheryl Haines founded For-Site in 2003 and has played an integral role in curating and collaborating with artists since.
Alder Gulch (alternatively called Alder Creek) is a place in the Ruby River valley, in the U.S. state of Montana, where gold was discovered on May 26, 1863 by William Fairweather and a group of men including Barney Hughes, Thomas Cover, Henry Rodgers, Henry Edgar and Bill Sweeney who were returning to the gold fields of Grasshopper Creek, Bannack, Montana.
 They were on their way to Yellowstone Country from Bannack but were waylaid by a band of Crow Indians.
 After being ordered out of Crow hunting grounds, they crossed the East Slope of the Tobacco Root Mountains and camped for the night in Elk Park, where William "Bill" Fairweather and Henry Edgar discovered gold, while the remaining party was out hunting for meat.
 Agreeing to keep the new discovery quiet the group of miners returned to the town of Bannack for supplies.
 Unfortunately word leaked out about the new strike, and miners followed the Fairweather party out of town.
 The party stopped at the Point of Rocks, part way between Bannack and Alder Gulch, and established the Fairweather Mining District in a miners meeting.
 It was agreed that the discoverers were entitled to two claims and first choice.
 The first stampede of miners reached Alder Gulch June 6, 1863 and the population swelled to over 10,000 in less than 3 months.
 The "Fourteen Mile City" ran the length of the gulch, and included the towns of Junction City, Adobe Town, Nevada City, Central City, Virginia City, Montana, Bear Town, Highland, Pine Grove French Town, Hungry Hollow, and Summit.
 Upon arrival the miners lived in brush wickiups, dugouts and under overhanging rocks until cabins could be built.
 The first structure built in Virginia City was the Mechanical Bakery.
 Virginia City, and Nevada City were the centers of commerce during the height of the Alder Gulch gold rush.
 In the first year the area had over 10,000 people living there.
 Montana Territory was established in May 1864, and the first territorial capital was Bannock.
 The capital then moved to Virginia City, where it remained until 1875.
 The Alder Gulch diggings were the richest gold placer deposits ever discovered, and in three years $30,000,000 was taken from them, with $10,000,000 taken out in the first year.
 Nowadays, except during summertime, the streets of Virginia City are usually quiet and relatively few visitors find their way to the 16 ton granite monument that marks the spot of that incredible discovery of May 26, 1863.
The PEPCON disaster was an industrial disaster that occurred in Henderson, Nevada on May 4, 1988 at the Pacific Engineering and Production Company of Nevada (PEPCON) plant.
 The conflagration and subsequent explosions killed two people, injured 372 others, and caused an estimated US$100 million of damage.
 A large portion of the Las Vegas Valley within a 10 mi radius of the plant was affected, and several agencies activated disaster plans.
The 2009 Shelby 427 was the third race of the 2009 NASCAR Sprint Cup season.
 This 427.5 mi race took place on March 1 of that year at the 1.5 mi Las Vegas Motor Speedway in the namesake Nevada city.
 The race was won by Kyle Busch.

Question: Ammonium perchlorate was involved in the 1988 disaster that took place in what Nevada city?
Answer: Henderson