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Oh no! You've made yourself heavier with the higher density balloon. The Manila airport is fast approaching! You need to gain altitude in order to catch a current going south at 2,286 m (7500 ft) in order to avoid Manila airport. Try again. Global Contenders '97/'98 | Expedition '96/'97 | Fossett | Virtual Flight Science of Ballooning | Teacher's Guide | Resources | Transcript | Balloon Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated October 2000 |