However , he acknowledged no breakthrough so far on delivering aid to the besieged city of Homs . Secretary Kerry says Syria is failing to comply with chemical weapons deal . U.N. mediator Lakhdar Brahimi calls peace talks in Geneva a "waste of time" The Associated Press contributed to this report. Meanwhile , Syria has failed to hand over known chemical weapons on time .
Secretary Kerry says Syria is failing to comply with chemical weapons deal . U.N. mediator Lakhdar Brahimi calls peace talks in Geneva a "waste of time" The Associated Press contributed to this report. Meanwhile , Syria has failed to hand over known chemical weapons on time .