Axel Schneider of Germany, foreground, leads a group of foreign military observers escorting by Vacheslav Ponomarev, the self-proclaimed mayor of Slovyansk, right, ahead of a press conference in city hall, Slovyansk, eastern Ukraine, Sunday, April 27, 2014. Germany's foreign minister has condemned as "revolting" the appearance under armed guard of eight European military observers being held prisoner by pro-Russian separatists in eastern Ukraine. (AP Photo/Alexander Zemlianichenko)
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