Yeah but not so sure about that...
USA has DOZENS of military bases in Europe.
I don't see Russia ignoring that... War between the two would be accross Europe not accros the ocean :/
Don't forget that the Russians are having nuclear-tipped ICMBs such as the SS-18 Satan, which are capable of targeting the mainland US. But the American military bases in Europe and Japan are easier targets for the Russians.
You are mistaken in my opinion "Satan" it was the only Russian missiles which feared the Americans. Their range is 16000 km, enough to reach America. I do think that Putin was lured to the Crimea to quarrel with the Ukrainian KB"southern" (manufacturer of rocket engines). Soon the Russian will not have missiles capable of reaching America.