Since the report was not yet public, Griffin couldn’t share its results, but he did offer his own views on the situation, including his belief that developing a replacement of some kind of the RD-180 is not something that can be done quickly. “Anyone who has ever been out on a test stand, testing their own rocket engine, knows that this is, at best, a five- or six-year process to bring it to fruition,” he said of the development time. “And it really doesn’t matter whether you’re producing, or returning to production, an existing design like the RD-180 or building your own.”