NATO aircraft have been scrambled to shadow Russian strategic bombers over the Atlantic and Black Sea and fighter planes over the Baltic in what the western alliance called an unusual burst of activity as tensions remain elevated because of the situation in Ukraine.
Russia's War Against Ukraine
The Guardian: NATO jets intercept Russian warplanes
A photo taken on April 29 , 2014 shows a French Rafale jet fighter flying over France. Britain and France deployed eight fighter jets on April 28, 2014 to reinforce NATO air patrols over the Baltics as tensions rise with Russia over Ukraine.