Did NATO betray Russia, breaking the deal to stay out of Eastern Europe?

Summary:  The news that "NATO invites Montenegro to join alliance, defying Russia" has sparked return (again) of stories that the US broke its deal with the Soviet Union to stay out of Eastern Europe. These accusations by Putin and other Russian leaders frame and poison relations with the West. Here are the facts. Putin's claims … Continue reading Did NATO betray Russia, breaking the deal to stay out of Eastern Europe?