I only saw a photograph of it before the door closed....
"LIGHT FLIGHT --A hot air balloon festival at a former NATO airfield in France broke two records -- sending up 408 piloted balloons in an hour, then lining up 391 balloons on runways and sending them up together. The even is organized by a descendent of 18th-century aeronautics pioneer Jean-Francois Pilatre de Rozier (Boston Globe August 3 2013)."