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
2013 Luxor hot air balloon crash stop all flights when you have a plane crash? ... You will cut the livelihoods for nearly 3,000 human beings who live on this kind of tourism." Angered by the industry-wide shutdown, tourism workers threatened to organize protests on 2 March. The same day, Saad admitted that pressure to resume balloon flights was mounting and promised that downtime would be less than a month. Hot air balloon rides at Luxor were set to resume in April, according to a statement on the Egyptian Civil Aviation Regulatory Commission's (CARC) website. Preliminary results of the government investigation ruled out criminal conduct as