Syrian refugees pass through the Turkish Cilvegozu gate border, Saturday, Aug. 31, 2013. U.N. chemical weapons experts have left Syria and crossed into neighboring Lebanon. The team on Friday carried out a fourth and final day of inspection as they sought to determine precisely what happened in the Aug. 21 alleged chemical weapons attack near Damascus. The team took samples from victims for examination in laboratories in Europe. (AP Photo/Gregorio Borgia) GB115