Ukrainian President Petro Poroshenko says Kyiv will reassert control over the country's eastern region, where fighting has intensified in recent days between government troops and pro-Russian separatist rebels.
Russia's War Against Ukraine
Radio Free Europe/Radio Liberty: Ukraine president vows to retake rebel-held east
A Ukrainian soldier mans a checkpoint near a cross placed at the site of an attack on a commuter bus near the eastern Ukrainian city of Volnovakha on January 14, 2015.
