So you get rid of Assad, who takes his place, Russia just wants a naval base, in a war situation it probably wouldn't last five minutes, all the factions fighting, would they be any better than Assad, it's a mess, to me best not get involved as it will just go on and on, most Arab countries hate each other and Iran,the Turks hate the Kurds,the US trained and armed a group who on completion of their training went over to ISIS, from photos the Airbase doesn't look that damaged, so all in all the suffering of the Syrian people continues