Rex ran fast in the dark, old subway tunnel. The only sound was his heavy boots on the crushed stone of the tracks. He held the silenced machine gun tight. The heat-vision scope made the cold tunnel look bright green and orange.
He looked at the small screen on the satellite phone that was clipped to his belt. The blinking red light was the building where Luna and Clara were held. It was getting closer.
I must be quiet, Rex thought. Ghost said that Julian will know when I get inside.
Rex was ten years old. He and Julian were in a dark, empty warehouse. Julian gave Rex a small, silent air pistol.
"Noise is for show, Rex," Julian had said. "If you make noise, you tell everyone where you are. But if you are silent, you can see their mistakes."
Julian pointed to a small light far away. "T
