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Giant helium balloon lifts up to two tons of building material over Tibet's high mountains
China carried out its first test of a two-ton-class tethered balloon in Tibet on Monday at an altitude of about 13,000 feet. The roughly 80-foot helium balloon lifts building material over rugged high ...
Add Yahoo as a preferred source to see more of our stories on Google. Gunner Hyatt, 6, died last week after inhaling helium from a Mylar balloon, according to a medical examiner (Legacy.com) Gunner ...
Add Yahoo as a preferred source to see more of our stories on Google. China carried out its first test of a two-ton-class tethered balloon in Tibet on Monday at an altitude of about 13,000 feet. The ...
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