US lacks tested response to nuclear detonation in space, war game finds

A war-gaming report concludes the U.S. has no validated operational response to a nuclear detonation in space, a capability gap that could undermine deterrence and degrade satellite constellations. The finding is based on a simulation, not a live test, and its operational implications remain uncertain. This matters because space-based nuclear effects could blind U.S. missile warning and communications, shifting the strategic balance.