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2008_8659_SP_Shenandoah Valley Hot Air Balloon
A Remax hot air balloon pilot  at the 2008 Shenandoah Valley Hot Air Balloon Festival at Historic Long Branch in Millwood, Virginia fires a propane burner to heat the air in the balloon "envelope" to keep the balloon upright.  Since hot air rises, this causes the balloon to stand up, and eventually fly.