The tricks of the multibillion-dollar drug business include using drones, submarines, ultralight planes and even frozen sharks to transport product across the US-Mexico border. Just consider that in 2016, US Customs and Border Protection Air and Marine Operations agents attempted to seize a submarine in the Pacific Ocean with nearly $194 million worth of cocaine.


원문출처 : http://www.cnn.com/2018/01/08/opinions/border-wall-cartels-trump-opinion-driver/index.html