Putin vows to 'choke' NATO in WWIII

How close is too close for NATO to spread Eastwards, and how far will they test the boundaries? Talks of Ukraine joining the military alliance were on the agenda the 2000s, but ceased after Russia's swift response to the Georgian aggression in Tskhinvali in 2008. Currently, the Ukraine is unable to join NATO due to internal conflict - the absence of which is a prerequisite for new members. It would seem then that stopping the US-initiated war in Eastern Ukraine would be beneficial to US interests - or, ar<br/><br/>