Proliferation watchers have kept track of A. Q. Khan's activities for about 30 years. In 1979, the Washington Post named him as the Pakistani engineer who had left his position at the uranium enrichment centrifuge facility at Almelo, Netherlands, four years earlier with "lists of subcontractors and probably blueprints for the plant." Khan then returned to Pakistan, where he soon became director of the country's secret uranium enrichment project at Kahuta, near Islamabad, and a key player in its nuclear weapons program.