1.   Keep the balloon to one side on non-stick paper.

2.   At night, when helium cools, propane burners will be used to keep the balloon aloft.

3.   If a way could be found to keep a balloon from cooling and heating, its duration would be nearly unlimited.

4.   He ate packets of food heated with chemicals to avoid the threat of sparking the methane and ethane tanks powering the burners that kept the balloon inflated.

5.   That warms the helium from below and keeps the balloon from losing altitude.

6.   The permitted route kept the balloon away from areas where there is heavy air traffic and also away from regions were rescue would be difficult.

7.   Cold weather generally lets hot air balloonists stay longer in the air, allowing them to limit their use of the propane gas needed to keep the balloon aloft.