In the quiet outskirts of Cleveland sits a facility that shapes the future of spaceflight. Inside the Glenn Research Center, metal chills to cryogenic temperatures, engines are tested to their limits, and every component must withstand conditions that would destroy anything less than perfect. This is one of NASA’s most demanding environments — and soon, Plug Power’s liquid hydrogen will be part of it. What seems like a small federal contract on paper is, in reality, an endorsement that only a handful of companies ever earn.

Hundreds of miles away, at NASA’s Neil A. Armstrong Test Facility in Sandusky, entire rocket systems are pushed to the edge inside a vacuum chamber capable of mimicking the near-absolute zero of deep space. Every drop of LH₂ used here undergoes scrutiny at a level unmatched in commercial industry. Plug Power becoming an approved supplier is therefore less about revenue and more about validation. NASA’s selection signals that the company’s technology, safety regime,…