It being the interim NUKE ICBM DEFEND Radar and Interception Location between USA AND RUSSIA.
At least in the majority of historical periods since Cold War, it was so damn true. Long Ranged Cruise Missiles in 2000AD Era changed it a little. Now with Tsar Outings mighty SARMAT ICBM and unlimited ranged nuke engine (recently killed 7 on test ship) SKYFALL missiles.
These days, missiles don't have to be limited to their Shortest Trajectory any longer. They can fly over most unexpected and undefended territories to hit you. Nuke engine for nuke missiles carrying nuke warheads can fly rounds around the globe without running out of fuel.