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This is gonna be good: Almost 15 stories at its highest point, the National Building Museum’s Great Hall features an Italian Renaissance design of eight Corinthian columns (among the tallest in the world), a central fountain, and myriad windows and archways that allow for a year-round display of celestial light. But the city’s roomiest architectural treasure will look even more special-effects-spectacular today, when D.C.’s most dedicated model-plane builders fly their fancy toys inside—that’s right: inside—the majestic room. For the Flying in the Great Hall extravaganza, the D.C. Maxecuters club will perform various aerial acrobatics—loops! corkscrews! hammerheads!—and maybe even buzz a few diners in the museum’s Blueprints Cafe. In between the derring-do, the Maxecuters will explain how they built their scale-replica aircraft—but only the experts will be allowed to work the controls. Watch your head at noon in the National Building Museum’s Great Hall, 401 F St. NW. Free. For reservations call (202) 272-2448. (Sean Daly)