Turkish chief of staff Khalosi Akar discussed today with his US counterpart Joseph Donform a number of issues of mutual concern, topped by ways of combating terrorism and the developments of incidents at the Syrian and Iraqi arenas. A statement issued by the Turkish chief of staff and carried by the Turkish Anadolu news agency in Ankara said the meeting, which was held in the U.S. capital of Washington, precedes the scheduled visit of President Tayyip Recep Erdogan of Turkey to the United States.