Actually I’m not from the Americas (though one of my ancestors did decide to leave Florida in the 1830s or 40s cos he had very dark coloured skin).
And I disagree that there’s a need to “pick a side” - both “sides” will stomp on smaller countries no matter what because that’s what authoritarian imperialistic powers do.
Iirc the USA did investigate making them during the cold war but concluded that the (very real) benefits - such as the ability to recall a missile after launching - weren’t worth cooking US citizens and allies with radiation from an unshielded nuclear reactor flying at mach 3 just above the surface; they planned to fly as low as 150m!
Their initial plans basically were to build a nuclear-ramjet “missile” that could fly for several days straight carrying dozens of nuclear warheads, autonomously dropping them on “enemies”. The big problem was that it’d have to fly over the USA and/or western Europe in order to reach the USSR.
Read up on Project Pluto if you wanna know more!