Jenson knew exactly where he was heading. With the aid of his walking stick and vision goggles, he quickly traversed the city that was cloaked mostly in perpetual darkness, despite the feeble glow of streetlights. He tried to stand up straight so that his ruined leg wouldn’t be noticeable, even though you could barely see the contraption that helped him walk, underneath his trouser leg. He tapped the metal cage that surrounded his leg soundly with his cane. “All thanks to science,” he said, as he took the heavy brass knocker in hand and let it fall.