I think it was two years ago that smoke from western fires kept Oshkosh IFR until almost noon on the final Saturday. The sun was shining, and the sky was (sort of) blue, but visibility stubbornly stayed at 2 1/2 miles. About 10 seconds after the ATIS flipped to 3 miles, about a thousand engines started up at once. I was in just barely legal VMC all the way home to Idaho. Sure hope this year isn’t a repeat of that, both for Airventure itself and for all of us flying to and from.