Ah, memories of those hot, humid summers in the Northeast. Don't miss it one bit. But places like Lehigh Gorge often made it worth enduring any discomfort. Wish I could have spent more time exploring its depths on foot or mountain bike the way guys like Scott Snell did. Nice that you managed to have blue sky, Mitch, vs. the usual milk-white sky of the season. Your curved bridge shot is especially nice. I'd believe the steam pusher scenario if the crew were facing forward and the smoke was trailing back over the tender.