Turkey's Prime Minister Tayyip Erdogan (R) and Foreign Minister Ahmet Davutoglu greet their supporters as they leave Friday prayers in Ankara August 22, 2014. Erdogan, who will be sworn in as president next Thursday, named Davutoglu as his future prime minister on Thursday and vowed a power struggle against a U.S.-based cleric he accuses of plotting against him would continue. REUTERS/Umit Bektas (TURKEY - Tags: POLITICS) - RTR43CQ9