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StratelliteAirships are divided into two main categories: rigid airships with rigid frames, i.e. zeppelins, and nonrigid or semirigid airships that maintain their shape by internal pressure. Blimps were named after the sound made after poking a finger into the shell.
Another airship concept is the "stratellite," which is essentially a cell tower that would float about 65,000 feet, or about 12 miles, above the Earth. The extra height would enable just 12 stratellites to completely cover the United States, according to its developer, GlobeTel Communications.