This past weekend, as I mentioned, I visited the border in Yuma, AZ, and witnessed the extraordinary lengths these cartels go to smuggle their goods … - John McCain

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This past weekend, as I mentioned, I visited the border in Yuma, AZ, and witnessed the extraordinary lengths these cartels go to smuggle their goods across the border. One cartel spent upwards of $1 million using sophisticated GPS-directed drilling equipment to develop their tunnel far below the surface to move goods underneath fencing and out of sight of law enforcement agencies. In Nogales, AZ, drug traffickers have used the city's sewer system to channel drugs across the border. Every other month tunnels are discovered underneath the border. Since 1990, 110 cross-border tunnels have been discovered. Twenty-four tunnels were discovered in 2008 alone.