anna deavere smith tackles race, justice and inequality, on stage. plus, much more. >> woodruff: world leaders met today at the united nations on ways to combat violent extremism around the world, especially in syria and iraq. newshour chief foreign affairs correspondent margaret warner is there and has this report. >> i have repeatedly said that our approach will take time. this is not an easy task. >> warner: today's acknowledgement came one year after president obama formed an international coalition against the islamic state, with much fanfare here at the u.n. the u.s.-led coalition includes some 60 countries, about two dozen taking part in the military campaign. the president told the group he is ultimately optimistic, but the date of success is unclear. >> we have isil taking root in areas that already are suffering from failed governance, in some cases; in some cases, civil war or sectarian strife. and as a consequence of the vacuum that exists in many of these areas, isil has been able to dig in. they have shown themselves to be resilient. >>

anna deavere smith explores race and justice on stage. >> we've retreated into a kind of segregationome people would say it's all part of this gap between the rich and the poor. >> woodruff: all that andor