Russian soldiers march in Moscow's Red Square during Friday's Victory Day parade, a show of military might amid tensions in Ukraine following Moscow's annexation of Crimea.
Kirill Kudryavtsev/AFP/Getty Images
Russia's President Vladimir Putin, right, addressed the media Wednesday along with the head of the Organisation for Security and Cooperation in Europe (OSCE), Swiss President Didier Burkhalter.
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A Russian armored vehicle on the road between Simferopol and Sevastopol in Crimea earlier this month. Russia annexed the region two weeks ago. Other Russian forces, across the border from Ukraine, may pull back in coming days.
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President Obama, accompanied by Dutch Prime Minister Mark Rutte, speaks during their joint news conference at the conclusion of the Nuclear Security Summit in The Hague on Tuesday.
Pablo Martinez Monsivais/AP
A Russian military officer, left, talks to Ukrainian Col. Yuli Mamchur before the Russian takeover of an air base near the Crimean town of Belbek on Saturday.
A woman holds a portrait of Russia's President Vladimir Putin during celebrations on the main square of the Crimean city of Simferopol after in its official annexation on Friday.
Armed men stood atop a chimney near Ukraine's naval headquarters in Sevastopol, Crimea, on Wednesday. They raised Russian flags after taking over much of the facility.
Vasily Fedosenko /Reuters /Landov