ANKARA   The grand imam of Al-Azhar in Egypt, the highest seat of Sunni Muslim learning, called on Arab leaders on Tuesday to take a “unified stance” on plans to displace Palestinians from the Gaza Strip. Egypt is set to host an emergency Arab summit on Tuesday to formulate a unified Arab stance on the Palestinian issue and present an Arab counterproposal to US plans for the displacement of Gaza's population. "We pray to God to grant success to the Arab leaders gathered at the Arab summit in