Mineral industry of Africa in 2005 from 16.1% in 2004. In 2005, the principal mineral targets in Africa were copper, diamond, gold, and platinum group metals (PGM). African countries that experienced the highest levels of exploration activity in 2005 were, in descending order based on the number of exploration sites as compiled by the USGS, South Africa, Burkina Faso, Ghana, and Zambia, but activity took place in a number of other countries. Gold accounted for approximately 51% of reported African exploration projects, diamond accounted for about 14%, copper and PGM each accounted for about 11%, and nickel accounted for 5%. Early stage projects accounted
S-TEC Corporation million in 2000. (DRS Technologies purchased the UAV business from Meggitt in 2002 but later closed the Mineral Wells facility.) S-TEC was purchased for $38 million by Cobham plc in 2008. In April 2014, Cobham sold Chelton Flight Systems and S-TEC Corporation to Genesys Aerosystems. <ul> S-TEC Corporation S-TEC Corporation is a United States corporation that was founded in 1978 and is headquartered in Mineral Wells, Texas. It manufactures flight control systems for the General Aviation aftermarket and for a number of original equipment manufacturers. S-TEC is the leader in the general aviation autopilot market for small- and mid-sized planes.