Simulations created by the US Pentagon reveal the potential devastation a nuclear bomb detonated in space as Russia probes stationing weapons in space.

A wargame exercise demonstrated the limits of European decision-making at a time of U.S. pullback.

In the simulation, Russia used a claimed humanitarian crisis in its Kaliningrad exclave to justify taking over the Lithuanian city of Marijampole, a transport hub near the borders of Poland and ...

Analysts say the exercise exposed vulnerabilities that could be exploited long before the continent is fully prepared. The ...