The idea of an 800 mph transportation system is just the latest idea from the mind of Elon Musk.

Musk is a 42-year-old engineer who co-founded PayPal and created Space Exploration Technologies (SpaceX), a private space exploration company, and Tesla Motors, an American electric car company that produces the acclaimed Tesla S model.

Musk is also chairman of SolarCity, a company he cofounded "to help combat global warming and minimize air pollution," according to his website.

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Delta’s president of nearly a decade, Glen Hauenstein, is stepping down Feb. 28, the company announced Wednesday. (AJC 2017)

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Fulton County District Attorney Fani Willis testifies before a state Senate committee at the Capitol in Atlanta on Wednesday, Dec. 17, 2025. (Arvin Temkar/AJC)

Credit: Arvin Temkar/AJC