Driving to Tennessee

We headed out to Tennessee taking the Northern route (I90) and finding it very nice. We hadn't traveled this route before and therefore discovered (and re-discovered in Paul's case) sights we hadn't seen before. We stopped at Devil's Tower, then Mt. Rushmore where we attended the last lighting ceremony of the year, and then onto and through the Bad Lands. We got a call from Cheri stating her surgery would be the next day, so we eliminated more side trips and headed straight to Tennessee.