found on http://mecanicien.tumblr.com
but credit for learning what a B17 was doing on a bridge goes to Bob, Vonredbeard.blogspot who somehow figured out the plane, the location, and what it was doing on the bridge! Thanks Bob!
B-17 44-83624 being delivered across the Mad River Bridge to the USAF Museum at Wright-Patterson AFB, OH.
info on the 'plane herself is here: http://www.warbirdregistry.org/b17registry/b17-4483624.html