Illegal immigrants connected to Mexico's drug cartels are growing hundreds of millions of dollars worth of marijuana in the heart of one of America's national treasures, according to authorities.
It's a booming business that, federal officials say, feeds Mexico's most violent drug traffickers.
For years, Mexican drug cartels have used the remote forest to conduct and conceal their business. But the pot production has intensified because it has become harder and harder to smuggle marijuana across the U.S.-Mexico border.
Sequoia National Forest is more than 350 miles from the border, named in honor of its 38 groves of giant sequoia trees dating back thousands of years. The forest covers 1.2 million acres in the Sierra Nevada Mountains.
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