A masked guard holds a young boy at a barricade outside a building being held by pro-Russia forces in Donetsk, Ukraine. Eleanor Beadsley/NPR hide caption

itoggle caption Eleanor Beadsley/NPR

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

itoggle caption Sean Gallup/Getty Images

Russian Foreign Minister Sergei Lavrov, left, and U.S. Secretary of State John Kerry before their talks Friday in London. Afterward, they reported no breakthroughs on finding a solution to the crisis in Ukraine. Brendan Smialowski/AP hide caption

itoggle caption Brendan Smialowski/AP

Armed men in unmarked military uniforms — who witnesses believe are Russian troops, but who Russian leaders say are "local self-defense" forces — stand outside the territory of a Ukrainian military unit in the Crimean village of Perevalnoye. Maxim Shipenkov /EPA/Landov hide caption

itoggle caption Maxim Shipenkov /EPA/Landov

A Free Syrian Army fighter in eastern Syria on Wednesday. /Reuters/Landov hide caption

itoggle caption /Reuters/Landov