** FILE ** In this file photo released Saturday Aug. 31, 2013, by the Organization for the Prohibition of Chemical Weapons, samples brought back by the U.N. chemical weapons inspection team are checked in upon their arrival at The Hague, Netherlands. Syria has sent the Organization for the Prohibition of Chemical Weapons an "initial declaration" outlining its weapons program, the organization said Friday Sept. 20, 2013. (AP Photo/OPCW, Henry Arvidsson, File)

Photo by: Henry Arvidsson

** FILE ** In this file photo released Saturday Aug. 31, 2013, by the Organization for the Prohibition of Chemical Weapons, samples brought back by the U.N. chemical weapons inspection team are checked in upon their arrival at The Hague, Netherlands. Syria has sent the Organization for the Prohibition of Chemical Weapons an "initial declaration" outlining its weapons program, the organization said Friday Sept. 20, 2013. (AP Photo/OPCW, Henry Arvidsson, File)