Masked pro-Russian protesters stand guard at a barricade in front of the seized office of the SBU state security service in Luhansk, eastern Ukraine April 15, 2014. Russia declared Ukraine on the ... more 
Masked pro-Russian protesters stand guard at a barricade in front of the seized office of the SBU state security service in Luhansk, eastern Ukraine April 15, 2014. Russia declared Ukraine on the brink of civil war on Tuesday as Kiev said an "anti-terrorist operation" against pro-Moscow separatists was underway, though the crackdown got off to a slow start, if at all. REUTERS/Shamil Zhumatov (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) less 
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Reuters | Photo By SHAMIL ZHUMATOV / REUTERS
Tue, Apr 15, 2014 7:45 AM EDT