Ukraine crisis: Russia-NATO tensions soar | After S-400, Su-35 in Belarus

The West is keeping an eye on Russian troop movements and war games in Belarus. Russia has deployed more forces and fighter jets to Belarus as tensions with NATO continue to rise. The EU, US have warned Russia against an invasion of Ukraine; and have threatened crippling sanctions. Russia has repeatedly denied that it is planning to invade Ukraine. The Kremlin, however, has stated that NATO backing for Ukraine poses a threat on Russia's western flank. Amid growing fears of a possible Russian incursion, NATO allies have substantially increased deployment. Watch the full video for more.