Based on my general understanding from following the "Drug War" as it relates to Mexico and Cartels, heroin is now one of the most profitable and dominant drugs

Based on my general understanding from following the "Drug War" as it relates to Mexico and Cartels, heroin is now one of the most profitable and dominant drugs being smuggled by the Sinaloa Federation (Cartel). As in heroin is the #1 preferred drug to smuggle into the US from Mexico. This is purely anecdotal from various sources, and not to discount the Afghan opaite trade.