The action was as hot as the weather as drivers competed for cash and prizes at the 6th Annual Futaba/O.S. Engine Nitro Challenge. Dirt Burners R/C Raceway in St. Louis, Missouri, proved once again to be an excellent venue and a fair test for intermediate and expert drivers alike. In fact, most of the races went down to the last few laps before a winner could be crowned. You can see all the action highlights here.