The year before the terrorist attacks of September 11, 2001, drone funding stood at around $284 million. By the fiscal year 2016, the Pentagon spent close to $3 billion on drones. Since their start 3,900 people have been killed in 422 strikes in Pakistan, where the drones are controlled by the Central Intelligence Agency. The controversy of drones stems from the American people's concern of using advanced technologies to kill an enemy in foreign countries.