A handful of companies are vying to be the first to take paying tourists for brief rides to the edge of space.
Some, like Virgin Galactic, have built sleek spaceships for the task.
But a company in Oklahoma is trying to get into the game with an old Lear Jet that has been fitted with an Atlas rocket engine.
Although it's unclear when — or if — the design will fly, customers are already buying enormously expensive tickets to ride the Rocketplane. Frank Morris of member station KCUR reports.
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