GRAFENWOEHR, Germany - Vladimir Putin's aggression in Ukraine and other intimidating shows of force have created a 'very different kind of scenario' for NATO, according to the defense alliance's top commander in Europe.
Russia's War Against Ukraine
NBC News: NATO aims to be ‘more responsive’ in wake of Russian aggression
An armed supporter of the self-proclaimed 'People's Republic of Donetsk' stands guard as a Russian convoy carrying humanitarian aid for residents of the Eastern Ukrainian Donetsk Oblast approaches the city of Makiyivka near Donetsk, on Dec. 12, 2014.