--lies between two superpowers (US and former Soviet Union, now Russia),would become a battleground if a nuclear war broke out An example: The American war plan used to try to shoot down missiles over Canadian cities before they reached US territory.-- lies between two superpowers (US and former Soviet Union, now Russia), would become a battleground if a nuclear war broke out An example: The American war plan used to try to shoot down missiles over Canadian cities before they reached US territory