Despite four decades of feverishly anti-establishment rocking by Crosby, Stills, Nash, and Young, fans are showing up at concerts and booing the rock veterans for performing anti-war tunes. They've even been mraching out en masse in protest against songs like "Ohio" and "Military Madness." "The forthcoming documentary 'CSNY: Deja Vu' charts that friction, portraying fans who saluted the group's efforts and those who felt betrayed by them, while introducing viewers to Iraqi War vets who are now protesting the war as musicians, politicians and social workers. Directed by Young and due in theaters July 25, the film blends concert and behind-the-scenes footage with short news features created by CNN correspondent Mike Cerre."