tribute, memorial, monument, architecture, museum, structures, front, group, people, building, ny, city, 9-11, new york, usa, 9/11, port of entry, New York City, metropolis, terrorist attack, operation, coercion, port, New York, district, facility, edifice, attack, state, United States of America, terrorism, America, U.S., enforcement, american state, united states, urban area, United States, social control, urban center, approval, surprise attack, north american country