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Date: 2013-07-15 19:00:14Hydrogen technologies Balloon Hot air balloon Montgolfier brothers Gas balloon Jean-François Pilâtre de Rozier Jean-Pierre Blanchard Aerostat Lighter than air Aviation Ballooning Aeronautics | National Aeronautics and Space Administration Bag Balloon NASA SUMMER OF INNOVATIONAdd to Reading ListSource URL: www.nasa.govDownload Document from Source WebsiteFile Size: 80,97 KBShare Document on Facebook |