Iran’s president Hassan Rouhani, Russia’s president Vladimir Putin and Turkey’s president Recep Tayyip Erdogan give a joint news conference following their trilateral talks in Sochi on February 14th. Photograph: Mikhail Klimentyevass via Getty Images

In the Black Sea resort of Sochi on St Valentine’s Day, Russia’s president Vladimir Putin welcomed the leaders of Turkey and Iran with tea and biscuit(...)