This is the case in the other stages in the supply chain and therefore offers an opportunity for someone to make more money while involved in the drug business (Castaneda, 1999).

In the 70s it was said that beefed up law enforcement could effectively seal the southern border of the United States border and stop drugs from entering its borders. It is for this reason that the United States uses patrols, checkpoints, sniffer dogs, cameras, motion detectors, heat sensors, drone aircraft and up to approximately 1,000 miles of steel beam, concrete walls and heavy mesh which stretches from California to Texas. This has been an expensive precautionary measure which has unsuccessfully attempted to stop the drugs getting within the borders of the United States. Approximately 330 tons of cocaine, 20 tons of heroin and 110 tons of methamphetamine are sold within the borders of the United States each year. According...
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