Logic's a wonderful thing; by logical analysis, one can determine the necessary reason for the existence of a dead city of a very high order on an utterly useless planet. Obviously a shipping transfer point! Necessarily...
He knew the theory of repairing the gizmo all right. He had that nicely taped. But there was the little matter of threading a wire through a too-small hole while under zero-g, and working in a spacesuit!
A story in the Time Travel Adventures Universe
A plain man becomes more. The story of Joe a man who is anything but plain, the three worlds he lives on and the three women he loves. Plus another in the far past that his love for actually started it all.
Was it a wild talent that MacReedy had, or was it just prophetic genius that led him to figure out new, improved ordnance weapons and make models of them--before the armed forces had them? Whichever it was, MacReedy was both valuable and dangerous--and when the general saw MacReedy's final figure, the weapons following the mobile rocket A-missile launcher....