People visit the ancient historical site of Syria's ravaged Palmyra on May 6, 2016 following its recapture by regime forces from the Islamic State group fighter.
Syrian troops backed by Russian air strikes and special forces on the ground recaptured UNESCO world heritage site Palmyra from Islamic State (IS) group fighters in March 2016.
 / AFP / LOUAI BESHARA        (Photo credit should read LOUAI BESHARA/AFP/Getty Images)