As much as any state in the USA, Arizona's development was driven by mining. Like other western states, prospectors were initially lured by gold deposits. The state subsequently became known more than anything for copper, of which it remains the largest producer in the country. In this video, contributor Keith Thompson gives us a drone's eye view of an Arizona mine which produced another base metal, lead. The Old 79 Mine, located near Hayden, was shuttered in 1962.