The Time for a New, All-American Advanced Liquid Rocket Engine Is Now, Mark Albrecht and Don Kerr, Roll Call
"We do not suggest that space cooperation with Russia is bad or that it should be totally curtailed or discouraged, but simply that there are elements of U.S. infrastructure that cannot be outsourced indefinitely. We must revitalize America's space infrastructure, and the right place to start is with an advanced-hydrocarbon-fueled booster engine -- an engine critical to U.S. leadership in rocket propulsion for access to space."
Keith's note: The authors dismissial of SpaceX progress and their 100% indigenous American engines is odd. The engines exist and are operational NOW. They also seem to be unaware of the much much larger, American-made engines that SpaceX (and undoubtedly Blue Origin) are developing. That said, the authors do make a good point about having non-Russian engines that other American launch vehicles could use. Alas, the authors decline to say who should pay for these new engines.