President of Turkey Recep Tayyip Erdogan (R), President of Iran Hassan Rouhani (C) and President of Russia Vladimir Putin (L) pose for a photo during the trilateral summit between Turkey, Iran and Russia on September 7, 2018 in Tehran, Iran. (AA)

President of Turkey Recep Tayyip Erdogan (R), President of Iran Hassan Rouhani (C) and President of Russia Vladimir Putin (L) pose for a photo during the trilateral summit between Turkey, Iran and Russia on September 7, 2018 in Tehran, Iran. (AA)

President of Turkey Recep Tayyip Erdogan (R), President of Iran Hassan Rouhani (C) and President of Russia Vladimir Putin (L) pose for a photo during the trilateral summit between Turkey, Iran and Russia on September 7, 2018 in Tehran, Iran. (AA)