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. Viktor Drachev/AFP/Getty Images hide caption

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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 hide caption

itoggle caption Pablo Martinez Monsivais/AP

President Obama and other leaders met in The Hague. Clockwise from bottom left: European Union Council President Herman Van Rompuy, Canadian Prime Minister Stephen Harper, French President Francois Hollande, British Prime Minister David Cameron, Obama, German Chancellor Angela Merkel, Japanese Prime Minister Shinzo Abe, Italian Prime Minister Matteo Renzi and EU President Jose Manuel Barroso. Sean Gallup/Getty Images hide caption

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President Obama tours the Rijksmusuem with Dutch Prime Minister Mark Rutte (left) and others ahead of the G-7 summit in The Hague, Netherlands, which is certain to focus on the situation in Crimea. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

As Russian soldiers walked one way in the distance, a departing Ukrainian soldier carried some of his belongings Friday at a military base in Perevalne, Crimea. Ivan Sekretarev/AP hide caption

itoggle caption Ivan Sekretarev/AP