By Nicolle Delgado MEXICO CITY – There’s a quiet neighborhood near the heart of this city’s colonial downtown that defies an orchestra of urban noise from nearby tourists, hard-sell street vendors and buskers of every musical genre. Popotla, just two blocks from the picturesque, carved doorways and family restaurants on Tacuba Street, is long known for its street-corner pharmacies and faded yellow storefronts bearing names like Frutería Las Delicias and Carnicería La Abundancia.
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