What Putin and Assad did not reveal after Moscow talks

Syria's President Bashar al-Assad has held talks with Russian President Vladimir Putin on an unannounced visit to Moscow.

Russian presidential spokesman Dmitry Peskov told reporters that the two leaders had discussed the fight against what he called terrorist groups, the continuation of Russian air strikes and Syria's plans for its troops.

But key questions remain about what the men see for Syria's future, as Jim Muir explains.