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Keywords:ACTION MOTION, ACTIVITIES/ACTION, CATEGORIES, Dupont Circle Station, Metro, North America, Susan Candelario, TRANSPORTATION STRUCTURES, US Capitol, United States of America, WORLD REGIONS & COUNTRIES, Washington D.C., Washington DC, action, activity, arch, arches, architectural, architectural detail, architecture, building, commute, commuting, design, motion, pattern, patterns, railroad, speed, station, subway, symmetrical, symmetry, terminal, tracks, train, transportation, tunnel, tunnels, underground