US says has indications toxic chemical used in Syria in April

Ban: Syria's war foes hinder aid access

Turkey shoots down Syrian plane

UN Security Council unanimously approves Syria aid access resolution

Kerry accuses Assad of stonewalling in peace talks

Russia: Syrian aid draft could lead to military action

Syria misses deadline to hand over all critical chemicals

Russia says Syria to ship more chemical arms

Germany to help dispose of Syrian chemical weapons

Chinese missile frigate to aid Syrian chemical weapons removal

OPCW: Bad weather delays the removal of chemical weapons from Syria

Russia sends armored trucks to Syria to transport chemical arms