Kerry says Russian aggression is biggest threat facing Ukraine during Kyiv visit

US Secretary of State John Kerry has met Ukrainian President Petro Poroshenko in Kyiv, where he emphasised that the US and Europe are committed to supporting Ukraine and that Russia must take steps to end the continuing conflict. Kerry said that the biggest threat facing Ukraine is Russia's continued aggression. “We want a diplomatic resolution, but we cannot close our eyes to tanks that are crossing the broder from Russia and coming into Ukraine. We can't close our eyes to russian fighters in unmarked uni