Gabriel crossed the square, picking his way through the cars and motorbikes parked haphazardly in the center, and entered the apartment house through a doorway marked “Entrance C.” The foyer was cold and in darkness. The lights, Gabriel remembered, operated on a timer to save electricity. Surveillance of the building had noted that residents, including Zwaiter, rarely bothered to switch them on—a fact that would prove to be an operational asset for Gabriel, because it had virtually assured him the advantage of working in the dark.

Now he paused in front of the elevator. Next to the elevator was a mirror. Surveillance had neglected to mention it. Gabriel, seeing his own reflection in the glass that night, had nearly drawn his Beretta and fired. Instead he had calmly reached into his jacket pocket for a coin and was holding it out toward the payment slot on the elevator when Zwaiter, dressed in a plaid jacket and clutching a paper sack containing a bottle of fig wine, walked through Entrance C for the last time.

“Excuse me, but are you Wadal Zwaiter?”

“No! Please, no!”

Gabriel had allowed the coin to fall from his fingertips. Before it had struck the floor he had drawn his Beretta and fired the first two shots. One of the rounds pierced the paper sack before striking Zwaiter in the chest. Blood and wine had mingled at Gabriel’s feet as he poured fire into the Palestinian’s collapsing body.

Now he looked into the mirror and saw himself as he had been that night, a boy angel in a leather jacket, an artist who had no comprehension of how the act he was about to commit would forever alter the course of his life. He had become someone else. He had remained someone else ever since. Shamron had neglected to tell him that would happen. He had taught him how to draw a gun and fire in one second, but he had done nothing to prepare him for what would happen afterward. Engaging the terrorist on his terms, on his battlefield, comes at a terrible price. It changes the men who do it, along with the society that dispatches them. It is the terrorist’s ultimate weapon. For Gabriel, the changes were visible as well. By the time he’d staggered into Paris for his next assignment, his temples were gray.

He looked into the mirror again and saw the bearded figure of Herr Klemp looking back at him. Images of the case flashed through his mind: a flattened embassy, his own dossier, Khaled . . . Was Shamron right? Was Khaled sending him a message? Had Khaled chosen Rome because of what Gabriel had done thirty years ago, on this very spot?