Russia and NATO

Moscow (CNN) -- In a telephone call Monday between Russia's Defense Minister General Sergei Shoigu and the U.S. Secretary of Defence Chuck Hagel, Shoigu described the activity of U.S. and NATO troops near Russia's border as "unprecedented."

According to the official Russian version of the call, his American counterpart assured him the alliance did not have "provocative or expansionist" intentions -- and that Russia should know this.

But it hardly seems to matter how often NATO makes these assurances. The Kremlin will never trust them. Fear of the Western military alliance's steady march east is deep-rooted. It strikes at the very heart of Russia's national sense of security, a relic of Cold War enmity which has seeped down to post-Soviet generations.

Ilya Saraev is a 15-year-old pupil at the First Moscow cadet school in Moscow. He thinks long and hard when I ask him about NATO. "I think NATO might be a friend to Russia but there's one point I don't understand: Why it needs to approach the border with Russia more and more," he says.