have you heard any reporting that suggests that that's the next worry, stacey meichtry? >> we don't -- ll -- >> ifill: mr. meichtry first. t's a constant dern. w -- constantconcern. when we're talking about islamic state you're talking about a group that occupies territory where there were materials to make chemical weapons. evidently, there was an agreement struck in order to deweaponize those arms, but you never know. there are concerns always that there are still materials out there. >> ifill: lorenzo vidino of the george washington university program on extremism and staceyc meichtry of the "wall street journal." thank you both very much. >> woodruff: now the politics of refugees here at home. politicians at all levels, from both parties, weighed in. our political director lisa desjardins reports.di >> reporter: dominating the u.s. house of representatives today: the refugee crisis that's been plaguing europe for months. as a bipartisan majority easily passed what's called the americi "safe" act. the bill does not mandate a pause, but would likely force one by requiri