[sangnoir]

I'll play the devils advocate

> Not just US, UK was also part of that agreement, and they also have done nothing to help Ukraine.

Which 'Ukraine'? The government which was democratically elected (and deposed by protests) or the new government. Let's for a second imagine that the "Occupy *" movement was cozy with the Russians, and managed to topple the US administration of the time. Which America is NATO obliged to protect?

[x0054]

Regardless of legitimacy of the current government in Ukraine, which was democratically elected by now, even ignoring that, the actual agreed upon border of Ukraine has been breached by a foreign nation without provocation or aggression on the part of Ukraine. It's hard to argue that regardless of the current state of Ukrainian politics, this deserves action under that original agreement.

Think about it, after this, who would ever be stupid enough to give up nuclear weapons on the promise of US or UK?