@Render
Prediction: They move some HiMARS to Kupiansk quickly and target the railroad supplying the eastern front.
There is probably a bridge at the Russian boarder that would be within range. I assume that targeting a bridge is wiser because of the extra time it takes to rebuild it.
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There is a train bridge on the Ru/Uk boarder that is within HiMAR range as far back as Shevchenkove: https://www.google.com/maps/search/Troits'ke,+Luhansk+Oblast,+Ukraine,+92101/@50.0051093,38.2009435,550m/data=!3m1!1e3
