Whats really going on between America and Russia?

My fellow fluther friends, it seems that the US has suspended contact with Russia. I am not quite understanding of what’s going on. Why would we go to war with Russia? Russia is conducting a 20,000,000 people to evacuate as a ‘Drill’ in Moscow, and with a kind of slight tension we have had between Russia and the USA. I worry that tension might get worse. So what will happen? Is there a capable war we may enter? This is scary if you ask me. What makes me feel kind of better, would to add that if a country presses those buttons, so will everyone else. We are talking about destroying our planet, so basically everyone loses. What’s everyone’s input on such a matter?