. >> woodruff: from northern ireland, special correspondent kira kay reports on the religious divide, still present 14 years after the peace agreement that ended the decades of violence. >> reporter: this small area, the tensions break out where catholic area butts up against protestant area. >> ifill: ray suarez talks with alexander thier about whether u.s. economic aid to afghanistan is having its intended effect. >> woodruff: and jeffrey brown sits down with producer, director and movie buff george stevens, jr. to talk about the art of making films and the masters of the craft. >> it's always this struggle between art and commerce. it's like a shotgun marriage of money and art. >> ifill: that's all ahead on tonight's "newshour." major funding for the pbs newshour has been provided by: and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> woodruff: a major look at the f.b.i.'s handling of forensic evidence is un

on our world page, special correspondent kira kay follows up on her story about religious tensions inthern ireland. she reports on the riots that flared during today's parade in belfast. plus, we have a new project online focusing on campaign battleground states. hari sreenivasan and political editor christina bellantoni have a preview. is >> so we've not go experiment looking at battleground states in political advertising. how are we doing is this this? >> we want to give a sense of what it's like to be a battleground state voter because if you live in a big city that won't be one of the tossups in the presidential election you may never know how much advertising is being spent to affect voters. so we took an average day in virginia, richmond suburbs, watched one network and saw how many ads were played in one half hour of network television. so you had 30 minutes, you had nearly eight minutes of ads from the presidential campaigns paid for by super pacs looking at the senate race, very, very negative messages. you can go to our web site and watch the video we have put together to g