Investigators also detail July chlorine attack allegations . `` All fingers point to Assad , '' Syria ambassador says . A Assad special envoy briefs Assad on lingering chemical weapons . ( CNN ) -- U.S. has four chemical weapons facilities it did n't previously disclose .
Investigators also detail July chlorine attack allegations . `` All fingers point to Assad , '' Syria ambassador says . A Assad special envoy briefs Assad on lingering chemical weapons . U.S. has four chemical weapons facilities it did n't previously disclose .