A Killing for Christ

The man in priest's garb gets out of the elevator at the top floor, leaving the gate ajar. He pulls out the loaded rifle he had hidden, and steps to the edge of the roof. St. Peter's Square is spread out before him like a great, colorful lake. There are more people than he has ever seen before.
Now the target arrives. The man on top of the building sights down the rifle at the small figure below. His finger is ready on the trigger, ready to gun down His Holiness, the Vicar of Christ...