Ed Yost own interests turned toward reviving the lost practice of manned hot-air ballooning. This technology had first been invented in France by in the late 18th century by pioneers led by the Montgolfier brothers, but under the Montgolfier system, the balloon's air was heated by a ground fire prior to the balloon being released. The inherent danger of this type of balloon flight led to the system being abandoned when hydrogen and later helium became available. One of Yost's key engineering insights was that a hot-air balloon could be made to carry its own fuel. The invention of relatively light burners
Philippine International Hot Air Balloon Fiesta newspaper from Korea and a large dog from Japan made their debut over the Pampanga skyline. Balloon participation from Malaysia, Korea, Japan, Germany, the United Kingdom, Sweden, Czechoslovakia, and the Netherlands drew crowds from around the world. Currently, the Philippine International Hot Air Balloon Festival continues to be a popular international sports aviation event. The 2006 festival featured 30 multicolored hot air balloons and more than a hundred balloon pilots from Finland, Sweden, the Netherlands, Germany, the Czech Republic, the Slovak Republic, Hungary, the United Kingdom, Canada, the United States, Japan, Korea, Malaysia, Singapore, Thailand and the Philippines. It also