I want to preface this by saying. I will go again next year if they have it. However, last night was not a good race. I am disappointed they had to stop the race to improve air quality. But, I am glad they did. I dont want to suffer the effects of breathing bad air. I believe the air quality issue would have been helped tremendously by reducing the amount of cautions. If you reduce the cautions the cars spend less time on the track filling the air with CO. I hope they learn from this, make it better and have a race again next year.