Dinah pushed off against the top rung of the ladder and flew "down" until she could arrest her momentum against the boiler room grate, then spun herself about so that her feet were touching it and her head was pointed back "up" toward the front door. This brought her eyes level with several flat-panel screens that had been mounted to the walls. They served as status indicators and control panels for the equipment mounted to the outside of the dome. The little nuke was the only thing that mattered to them at the moment. It had a screen all to itself. Dinah woke it up with a tap. It refreshed itself with a graphical display, showing the temperature of the plutonium pellet at its core, its current output level, the RPMs and health metrics of the Stirling engine that converted its heat into electrical power, and the charge level of the batteries and of the supercapacitor that served as a buffer to store energy when it wasn’t needed and release it when it was. Everything seemed normal there. Not much could really go wrong with these things. This one was brand new.