Judy Dempsey is a senior fellow at Carnegie Europe and editor-in-chief of the international relations blog Strategic Europe.
Europe is facing one of its most serious crises since the breakup of the Soviet Union in 1991.
Opinion
What the Ukraine crisis means for Europe
EU remains fundamentally divided over how to deal with Vladimir Putin
First German-led NATO battle group reinforcement military vehicles arrive at Rukla military base in Lithuania on Feb 17: Putin's intimidation of Ukraine has given the alliance a new sense of purpose. © Reuters
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