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How do hot air balloons work?
Press packer Millie takes us through a day at the Bristol Balloon Fiesta, and chats to a pilot about how hot air balloons work.
↗ https://www.bbc.co.uk/newsround/66527030Press packer Millie takes us through a day at the Bristol Balloon Fiesta, and chats to a pilot about how hot air balloons work.
↗ https://www.bbc.co.uk/newsround/66527030