NEW : Germany and Britain agree `` Syria can not continue unpunished '' to use the words of German Chancellor Angela Merkel in a recent interview with The New York Times. Obama tells PBS that Syria carried out chemical attacks . ` If any country attacks another when it wants , that is like the Middle Ages , '' he said . Syria says rebels obtained materials for chemical weapons from other countries .
NEW : Germany and Britain agree `` Syria can not continue unpunished '' to use the words of German Chancellor Angela Merkel in a recent interview with The New York Times. Obama tells PBS that Syria carried out chemical attacks . Syria says rebels obtained materials for chemical weapons from other countries .