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"Its flight test, on a very demanding long-range trajectory, represented an unprecedented technical challenge that will pave the way for the future of our national hypervelocity roadmap," the agency said in a statement.

The report also states that “various interceptor programs” are underway for attacking enemy hypersonic missiles, including interceptor missiles, hypervelocity projectiles, directed-energy weapons and electronic attack systems.

Instead, the Navy is pursuing an offshoot of the railgun, a hypervelocity projectile, that can be fired from existing gun systems.

“And, No. 3 is the development of new weapons systems that are not covered by existing treaties, meaning space- and cyber-related developments, as well as other stuff such as hypervelocity weapons.”

The ejection of their companions is the likely origin of the hypervelocity stars discovered in 2005 by Warren Brown and his collaborators in the halo of the Milky Way.