DECATUR, Ala. (WHNT) — The Alabama Jubilee Hot Air Balloon Classic returns to Decatur for another year of high-flying fun!

[gentle music] - [Michelle] Hot air balloons might seem like magic, but there's actually some pretty straightforward science behind how they fly. - Hot air balloon's about as simple as you can get.

Narrator:Felix Baumgartner's mission depends entirely on one of the least heralded but most remarkable pieces of equipment a balloon. Narrator:It's the oldest flying machine of them all.

The weather is the crucial factor — conditions such as wind and rain are taken into account before it's declared safe for the balloons to fly. As a result, several dates are pencilled in each ...