hail, walloch, bernard and irene shorts, citi foundation, roselyn walter. corporate by mutual of america customized and mutual retirement products. that's why we're your retirement company. additional support is provided by -- and by the corporation for public broadcasting and contributions to your pbs station and viewers like you. thank you. from studios at lincoln senator in new york, this is pbs "newshour weekend." >>> good evening, thanks for joining us. muslim extremists who have over run much of northern and western iraq have seized another town 90 miles from iraq's border with jordan. the capture means extremists control a final stretch of a major highway connecting iraq to jordan. in a television interview that aired today president obama expressed concern about problem, al qaeda in yemen and isis in iraq. he says america has to proceed carefully. >> this is going to be a global challenge and one the united states is going to address. we're not going to be able to address is alone. what we can't do is think we're going to play whac-a-mole and have t