Today I saw a C-130 doing touch and goes at a civilian airport. Why?

I was in downtown Kansas City and saw a breathtaking sight: A C-130 transport was circling around a civilian airport just north of downtown doing touch and goes. There are a few ANG stations in the outer lying regions, but none based at this airport. Do the armed forces perform orientation missions to various city airports, or do pilots in training take liberties in choosing various landing spots to get stick time? There were civilian aircraft entering the pattern along with the C-130, so they didn't clear the airspace for them. Just wondering why they would do that. Either way, it was pretty cool to see.