Ukraine is the largest Country in Europe. It has a population of around 45,000.
The Ukraine is split between pro-Russian sentiment in the east and those favoring closer ties to the EU in the west.
The US and Russia are on opposite sides in the Syrian war, but they hope to find common ground in fighting IS jihadists. Also on tap, tensions in Ukraine are rising after Russia accused Kiev of interfering in Crimea.
Russian President Vladimir Putin has arrived in Crimea, the annexed territory that once belonged to Ukraine. His visit comes shortly after he accused the government in Kyiv of a military incursion into the territory.