chunk: Langdon and Vetra rush back to the Vatican where they find Commander Richter hovering over McKenna with a gun, the Vatican symbol branded into McKenna's chest. Richter and Archbishop Simeon are shot by the Guards. As Richter dies before Langdon, he opens his hand to reveal a key which Langdon takes. The stolen antimatter vial is found in St. Peter's Tomb below the church, but the battery life is too low to risk re-connecting it to a battery. McKenna, a former military pilot, seizes the vial and uses an awaiting helicopter to fly above the Vatican. At a high altitude, he parachutes out as the antimatter bomb explodes overhead. McKenna is hailed a hero and savior, and the cardinals move to elect him pope. Langdon and Vetra use Richter's key to watch a security video showing McKenna speaking to Richter before the attack. The video reveals it is McKenna, not the Illuminati, who masterminded the scheme. McKenna reveals he murdered the previous pope because he felt the pope had betrayed the