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“I know,” Clancy replied tiredly. After another moment he seemed to gather his strength. “We might as well see how they do.”

Clancy pressed a button that opened a control panel. The screen showed a field of lines, some bright and others less so. Clancy adjusted a control and the lines shifted to a region where most of the lines were very bright. As the device came to the region that had been the catalyst for this enterprise, both Ben and Clancy looked carefully to discover the results of their effort.
I like how you leave the ending purposefully vague. We, of course, want to believe that things are going to be much better in that timeline due to Clark going back with Lois... but you've neatly left us wondering, just a bit.

Now I'm going to think about that all night long.