Due to adverse weather conditions, the takeoff, planned for September 15, was postponed several times Finally, the Council decided that October 14 would be the final attempt, as winter in the Tatra mountains comes earlier than in the plains. On the scheduled day, a large group of spectators showed up in the Chocholowska Valley, brought by special buses and taxis. There were also numerous journalists, including those from the
National Geographic. As the Kraków's
Ilustrowany Kurier Codzienny newspaper wrote later, the crew, dressed in special uniforms with parachutes, loaded into the gondola. The bag began to raise at around 1:00 a.m., but strong winds made the task difficult. Few spectators knew that the bag was being filled with highly combustible
hydrogen, the same gas implicated in the
Hindenburg disaster. The safer alternative,
helium, was not available to them as most of the world's supply was in
Texas and the United States made use of most of the production. At around 4:00 a.m. the gigantic balloon was filled with hydrogen. Without warning and from some undetermined cause, the stiff fabric went up in flames. According to witnesses, a spark appeared on the top of the bag and quickly enveloped the balloon. It burned very fast. Fortunately, the gondola was spared and no one was injured., which gave Polish scientists hope for a next attempt. ==Aftermath==