Fascinating program. I'd love to be involved with a project like this.

http://www.pbs.org/wgbh/nova/space/ben-franklins-balloons.html

Odd they've chosen to call the program "Ben Franklin's Balloons" despite the fact that his only contribution seems to have been that he wrote about what the Montgolfiers were actually doing. Guess it's just catchier than "Joseph-Michel and Jacques-Étienne Montgolfier's Balloons."