The Bojinka plot was a large-scale, three-phase terrorist attack planned – but never executed – by Ramzi Yousef and Khalid Sheikh Mohammed for January 1995. They intended to assassinate Pope John Paul II; blow up 11 airliners in flight from Asia to the United States, with the goal of killing approximately 4,000 passengers and shutting down air travel around the world; and crash a plane into the headquarters of the United States Central Intelligence Agency (CIA) in Langley, Virginia.