Phew! You just made it! The less dense air in the balloon has made you
lighter so you can rise. You're in the southerly current. But now you get an
e-mail from your meteorologist friend, warning you that a major thunderstorm is
in your path over Nigeria. You need to descend to 1,524 m (5,000 ft) in order to avoid it.
What are you going to do?
