NASA Administrator Jared Isaacman has stated "we simply will not fly it" if claims about the costs of the repurposed Mars rover engineering model prove anywhere near accurate. Isaacman was responding to the Planetary Society's chief of space policy, Casey Dreier, who had run the numbers on his plan to send a robot to the Moon, built from parts of engineering models of the successful Mars rovers Perseverance and Curiosity. Dreier estimated that t…