What I remember most about my return to Mexico last year are the narcomantas. At least that’s what everyone called them: “drug banners.” Perhaps a dozen feet long and several feet high, they were hung in parks and plazas around Monterrey. Their messages were hand-painted in black block letters. They all said virtually the same thing, even misspelling the same name in the same way. Similar banners appeared in eight other Mexican cities that day—Aug. 26, 2008.