Mujahideen (Islamic guerrillas) stand on top of a Soviet helicopter they brought down in Afghanistan in 1979. Saudi multimillionaire Osama bin Laden helped finance training camps for the mujahideen, who fought against the Soviet Union’s military occupation of Afghanistan and were trained by the United States Central Intelligence Agency (CIA). Thousands of these guerrilla fighters later joined the al-Qaeda terrorist network that bin Laden founded after the Soviets were ousted.