EL PASO, Texas (Border Report) -- U.S. border officials often notify news outlets of massive drug busts at ports of entry.

Most recently, U.S. Customs and Border Protection said that in August, the San Diego Office of Field Operations seized 10,000 pounds of narcotics worth $24 million.

On Friday, CBP announced that border officers in Brownsville, Texas, seized 91.42 pounds of methamphetamine worth $840,000 at the Veterans International Bridge.

The bust in South Texas and at least three in San Diego involved Mexican men, some of whom had their visas or border-crossing privileges revoked.

However, the majority of drug trafficking cases involve U.S. citizens. According to the Cato Institute, a Washington, D.C.-based think tank, as many as four out of five convicted drug traffickers were

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