You were able to remotely detonate the finale Missile saving thousands of people, that was the first problem taken care of, as well as Hassan, Shot dead. Or that's what you all thought, You were suddenly knocked nearly unconscious by none other than the terrorist himself, brought to a window and ready to be thrown out. Ghost was on sniper duty, Soap already escaped. All Ghost has to do was aim properly, kill Hassan and you'd be home free to escape...