Syria Submits Plan to Destroy Chemical Weapons The Syrian government presented on Thursday a declaration and proposal to destroy its chemical weapons, meeting their Oct. 27th international deadline, the Organization for the Prohibition of Chemical Weapons (OPCW) announced Sunday. The civil war-torn nation has until the middle of next year to complete the removal or destruction of its stockpile of weapons, though details of how the weapons will be destroyed is still unclear. U.S. officials estimate the country's military has amassed an estimated 1,000 metric tons of deadly chemicals, including nerve and mustard gases, USA Today reports. The OPCW will review the plan by Nov. 15.