A former space policy adviser during President Donald Trump's first administration called on NASA to revise its plans for sending humans back to the moon, suggesting the agency "off-ramp" its reliance on Boeing Co.'s giant moon rocket.
Scott Pace, the former executive secretary of the National Space Council during Trump's first term, said it is time that NASA start considering alternative commercial rockets to the Boeing-built Space Launch System that can send people to the vicinity of the moon and Mars.