The elevator car finally arrived and the group entered. Juan gave the two teachers a goofy grin and they soon ignored him. They exited seven hundred eighty feet above the street onto an open deck surrounded by a chest-high glass barrier. The vista was stunning. Far below, they could see ships in the Huangpu River and the famous Bund Promenade on the opposite side. To the north was the mighty Yangtze. And if one looked east, over the sprawl, there were the placid waters of the East China Sea.

The children oohed and aahed at the amazing views. For his part, Cabrillo was suitably impressed, but he had come here for one particular vista. He took a moment to check to see if anyone on the observation deck looked out of place. There was one security guard, who made a slow circuit of the deck like a shark patrolling one of those enormous aquarium tanks. The rest were tourists like himself or young couples playing a little hooky during the workweek. He approached the best spot for looking down on the rooftop garden but gave it no more than a glance before turning to look at the central structure that housed this tower’s elevator machinery. He saw the security camera immediately, the only one on the observation deck. It was trained on the spot Cabrillo had seen was the best to study the target building. Someone wanted to know if they were being watched.

Juan hadn’t reacted when he’d spotted the camera. He was too professional for that. He was also curious. He moved out of its range, strolling along like any typical tourist. He spent another twenty minutes looking at the view. The schoolgirls were gone, replaced by a group of German tourists on a package holiday. He estimated enough time had passed that no one would connect him to what he was about to do. He had already removed his baseball cap and reversed his jacket. It had been light blue with a logo. Now it was dark green and unadorned.

He moved under the camera and, when no one was looking, reached up to change its angle ever so slightly. He moved away to wait. It took ten minutes. The guy who arrived wore a suit, not the uniform of a typical maintenance man. He went straight for the camera and returned it to its original position. The man had a Bluetooth headset strapped over one ear, and upon instructions of whoever was monitoring the camera feed, he tweaked the angle of the camera another few degrees.