Bowersox and Cooke
As Ken Bowersox (left), acting associate administrator for human exploration and operations at NASA, defended the agency's architecture for Artemis, former associate administrator Doug Cooke (right) called instead for greater use of the larger SLS Block 1B rocket.

Members of a House committee expressed skepticism about NASA’s reliance on commercial launch vehicles to carry out human lunar landings by 2024 rather than an upgraded version of the Space Launch System.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...