US President Barack Obama spoke to Turkey's Prime Minister Recep Tayyip Erdogan, pictured on April 7, following complaints from Ankara about his remarks on Armenian massacres under the Ottoman Empire, the White House said Monday.(AFP/File/Adem Altan)AFP – US President Barack Obama spoke to Turkey’s Prime Minister Recep Tayyip Erdogan, following complaints from Ankara about his remarks on Armenian massacres under the Ottoman Empire, the White House said Monday.