It was late August and Petro Poroshenko, Ukraine's president, was running out of time: separatist rebels backed by thousands of Russian troops were pounding Ukrainian forces in the east of his country. He needed Vladimir Putin to agree to a ceasefire - and fast. So he played what he thought was his trump card.
Russia's War Against Ukraine
Financial Times: Battle for Ukraine – how a diplomatic success unravelled
Ukrainian President Petro Poroshenko holds a part of a damaged commuter bus hit by a rocket strike near Volnovakha that killed 13 people as he speaks during a session of the World Economic Forum annual meeting on Jan. 21 in Davos.
