What you’re forgetting is that this is 2014 not 1968. We can see unusual troop movements from space long before they cross a border and head for a capital. Also, Europe and the USA are watching, and won’t hesitate to yank the plug on the steady stream of goods flowing into Russia. It’s a much fuller picture, with many more moving parts than 50 years ago. It’s not going to happen the same way as with the Czechs.
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