Greek Prime Minister Alexis Tsipras (R) holds talks with his Estonian counterpart Juri Ratas in Athens, Greece, on May 29, 2017. Greek Prime Minister Alexis Tsipras welcomed his Estonian counterpart Juri Ratas in Athens on Monday, where they discussed the challenges of the upcoming Estonia's Presidency of the Council of the European Union. (Xinhua/Marios Lolos)
