 ABC's Elizabeth Schulze, the Israeli military again ordering the evacuation of Gaza City, an early target of the war. You're listening to ABC News. This is the story of the one. As a maintenance engineer, he hears things differently. To the untrained ear, everything on his shop floor might sound fine, but he can hear gears grinding or a belt slipping. So he steps in to fix the problem at hand before it gets out of hand. And he knows...