A MiG-21 fighter — a leftover monument from the Soviet era — is the centerpiece of the Aviators Neighborhood in Deveselu, Romania. Now the base has become a U.S. Navy facility that is part of NATO's anti-missile shield for Europe. Gabriel Amza for NPR hide caption

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NATO on Thursday ordered a naval force to move immediately to the Aegean Sea to help end the deadly smuggling of migrants between Turkey and Greece. In this photo from last June, a Greek coast guard vessel arrives carrying migrants at the port of Mytilene, Greece, after a rescue operation. Thanassis Stavrakis/AP hide caption

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Standing beside his country's flag, Foreign Minister Igor Luksic of Montenegro attends a news conference after Wednesday's meeting at NATO headquarters in Brussels. Eric Vidal/Reuters /Landov hide caption

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The burned Doctors Without Borders hospital is seen after explosions in the northern Afghan city of Kunduz on Saturday. Doctors Without Borders says 12 staff members and 10 patients were killed in the attack and 37 others were wounded. AP hide caption

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Smoke rises from Kunduz, Afghanistan on Thursday. Government forces have reportedly retaken the city after it was seized by the Taliban on Monday. AP hide caption

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'A Shocking Development' In The Long Struggle To Hold On To Kunduz
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U.S. soldiers stand beside a Patriot missile system at a Turkish military base in Gaziantep, southeastern Turkey, last October. In a joint statement, Washington and Ankara said the missiles would be withdrawn for updating and modernization. Osman Orsal/Reuters/Landov hide caption

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Flags of member nations wave outside NATO headquarters in Brussels. For just the fifth time in its 66-year history, NATO ambassadors met in an emergency, Article 4 session to gauge the threat that the so-called Islamic State poses to Turkey. Geert Vanden Wijngaert/AP hide caption

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U.S. Bradley fighting vehicles take part in a joint exercise with Georgia at a military base near Tbilisi. Bradleys would be deployed to NATO member states in Eastern Europe and the Baltics if a Pentagon proposal is approved. Zurab Kurtsikidze/EPA/Landov hide caption

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Helicopter belonging to the Netherlands participates in NATO's Dynamic Mongoose anti-submarine exercise in the North Sea, off the coast of Norway, on May 4, 2015. MARIT HOMMEDAL/AFP/Getty Images hide caption

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Secretary of State John Kerry shakes hands with Ukrainian President Petro Poroshenko in Kiev Thursday. The U.S. and its NATO allies are discussing how to help Ukraine maintain its borders against a separatist movement. Jim Watson/AFP/Getty Images hide caption

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U.S. And NATO Seek New Ways To Help Secure Ukraine's Border
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Supreme Allied Commander Gen. Philip Breedlove attends a media conference at NATO headquarters in Brussels on Jan. 22. Breedlove told NPR on Thursday that "the conditions in eastern Ukraine have to change." Geert Vanden Wijngaert/AP hide caption

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NATO Commander: 'Conditions In Eastern Ukraine Have To Change'
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NATO has reported a spike in Russian military activity at sea and in NATO and other western European countries' airspace as tensions have mounted over Ukraine. Here, a Russian military long-range bomber aircraft flies in international airspace on Oct. 29. Royal Air Force/AP hide caption

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Russia And The West: Close Encounters Of The Cold War Kind
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