Washington, Jan 27 (Reporter) The US State Department approved a potential sale of F-35 combat aircraft and related equipment to Greece for an estimated $8.6 billion, the Pentagon said in a statement. "The State Department has made a determination approving a possible Foreign Military Sale to the Government of Greece of F-35 Joint Strike Fighter Conventional Take Off and Landing (CTOL) aircraft and related equipment for an estimated cost of $8.6 billion," the statement said...////...