"Every evening, during the shift change, the gun goes silent for an hour. It’s a chance for the system to do some kind of maintenance and recalibration or some such. The engineers inspect things. I don’t know all the details. Anyway, T.R. is going to be there for that and he said it was all right for me to ‘tag along,’ whatever that means." Saskia checked her watch. "I need to get going. Jules! Let’s go!"