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Airbags can protect us from car accidents. Airbag's sensor can feel a crash. Then the bag immediately fills with gas. It acts as a big cushion. The bag keeps our body from hitting hard objects. That way you don't get seriously hurt.
American inventor John Hetrick made the first airbags in 1951. He had an idea after almost having an accident. He remembered compressed air being used to shoot weapons underwater. Hetrick tried to use the same system for airbags. Sadly, at first it wasn't fast enough to be effective.
Overtime, however, people improved airbags for example, a man named Allen Breed made a faster sensor. Airbags are now safe enough to use in cars. Thousands of lives have been saved thanks to airbags.
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