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Lakshmi Kantha was interview by the Wall Street Journal for a new video on the Boeing X-37B.

The uncrewed military space plane can stay aloft for over a year and recently started a new, classified mission.

Kantha is a professor emeritus in the Ann and H.J. Smead Department of Aerospace Engineering Sciences with more than four decades of aerospace experience.

The video focuses on potential missions for the X-37B, which have not been disclosed publicly. In the interview, Kantha discussed the value of the craft for national security purposes.