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A US Army Patriot Missile System participates in the exercise DEFENDER-Europe 21 in Croatia on May 17, 2021. (US Army)
Europe
Europe
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Commentary
Caption
President of Ukraine, Petro Poroshenko (R) congratulations the newly elected Prime Minister Volodymyr Groysman (L) during a session of Ukrainian Parliament in Kiev, Ukraine on April 14, 2016. (Vladimir Shtanko/Anadolu Agency/Getty Images)
Commentary
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French troops patrol around the Eiffel Tower on January 12, 2015 in Paris, France. (Jeff J Mitchell/Getty Images)
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A Russian Sukhoi Su-24 attack aircraft makes a very low altitude pass by the guided missile destroyer USS Donald Cook in international waters in the Baltic Sea, April 12, 2016. (U.S. Navy/Released)
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The U.S. Navy flight demonstration squadron, the Blue Angels, fly in the Delta Formation over the aircraft carrier USS George H.W. Bush off the Florida coast near Mayport Naval Station, Fla., in the Atlantic Ocean, Dec.10, 2013. (DoD/Released)
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Russian Prime Minister Vladimir Putin at the Russian armament exhibition Expo Arms-2011 September 9 2011 in the Urals town of Nizhny Tagil, Russia. (Sasha Mordovets/Getty Images)
Commentary
In the Media
Experts
Matthew Boyse
Senior Fellow, Center on Europe and Eurasia
Luke Coffey
Senior Fellow, Center on Europe and Eurasia
Tsiporah Fried
Visiting Senior Fellow
