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Punctuated by explosions of ecstatic gospel music and black-and-white footage of mean local streets, David Petersen’s Let the Church Say Amen is an intimate portrait of the less affluent precincts of inner-city Washington. A storefront chapel on 1st Street NW is the hub of this cinéma vérité documentary, which also visits homeless shelters, used-clothing centers, and vocational classes. The character who clearly most compels Petersen is a shelter-dwelling ex-druggie whose dream of a house with a yard and a tree is cruelly upstaged by the random murder of his son. The film shows more than it tells, but the implication of one episode is clear: When George W. Bush tells Easter Egg Rollers of his hope that God will “continue to bless the United States of America,” you know he’s not talking about the same God who oversees the intersection of 1st and Randolph. The film screens at 4:30 p.m. in the National Gallery of Art’s East Building Auditorium, 4th Street and Constitution Ave. NW. Free. (202) 842-6799. (Mark Jenkins)