UN-Arab League envoy Lakhdar Brahimi told the UN Security Council on Wednesay that a ceasefire in Syria this week would be a \"small step\" toward reaching a settlement but he was uncertain whether it would hold, according to diplomats at a closed meeting. Brahimi also appealed for unanimous support for his efforts to reach a ceasefire, warning the 15-nation council that a new failure among its divided members would cause the 19-month old civil war to spread, the diplomats told AFP.