The Pentagon has long dreamed of constructing an American "Iron Dome." The technology is couched in the defense language – i.e., to make America safe again. But like its Israeli counterpart, it would function as an offensive weapon, giving the United States the ability to launch nuclear attacks anywhere in the world without having to worry about the consequences of a similar response. This power could upend the fragile peace maintained by decades of mutually assured destruction, a doctrine that has underpinned global stability since the 1940s.

A New Global Arms Race

Washington's war planners have long salivated at the thought of winning a nuclear confrontation and have sought the ability to do so for decades. Some believe that they have found a solution and a savior in the South African-born billionaire and his technology.

Neoconservative think tank the Heritage Foundation published a video last year stating that Musk might have "solved the nuclear threat coming from China." It claimed that Starlink satellites from his SpaceX company could be easily modified to carry weapons that could shoot down incoming rockets. As they explain:

Elon Musk has proven that you can put microsatellites into orbit, for $1 million apiece. Using that same technology, we can put 1,000 microsatellites in continuous orbit around the Earth, that can track, engage and shoot down, using tungsten slugs, missiles that are launched from North Korea, Iran, Russia, and China."

Although the Heritage Foundation advises using tungsten slugs (i.e., bullets) as interceptors, hypersonic missiles have been opted for instead. To this end, a new organization, the Castelion Company, was established in 2023.

Castelion is a SpaceX cutout; six of the seven members of its leadership team and two of its four senior advisors are ex-senior SpaceX employees. The other two advisors are former high officials from the Central Intelligence Agency, including Mike Griffin, Musk's longtime friend, mentor, and partner.