Syrian National Coalition leader Moaz Alkhatib speaks to the media after meeting with Arab League head Nabil al-Arabi in CairoAMMAN (Reuters) – Syria's opposition has postponed a gathering to type a provisional executive, within the newest setback to opposition efforts to create an administration to take over if President Bashar al-Assad is ousted, coalition sources stated on Sunday. The Syrian National Coalition meeting to opt for a provisional prime minister, which was due to be held on March 12 after being postponed once already, has been rescheduled for March 20, but it surely used to be unsure it could be held even then, the sources stated. "We can not come up with the money for a break up over this problem any longer. …