A Ukrainian military aircraft flies as flares are set off near Slaviansk
A Ukrainian military aircraft flies as flares are set off near Slaviansk July 8, 2014. Ukraine's government kept up military pressure against pro-Russian rebels on Tuesday, threatening them with an "nasty surprise", while the militants said they were preparing to fight back after losing their main stronghold. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY)