More than 75 drug-smuggling tunnels have been discovered under the U.S.-Mexico border in just the past six years, and one of the more intriguing cases involves 17 Mexican men who claim they were kidnapped and forced to carry out the work for months before Mexican authorities found them.
There's always been some mystery surrounding tunnels. Diggers were thought to be well-paid cartel loyalists or, as urban legend goes, laborers killed soon after the tunnel's completion to ensure its secrecy.
At a 10,000-foot summit in Yosemite National Park, Frank Gehrke clicks into his cross-country skis and pushes off down a small embankment onto a meadow of crusty snow. He's California's chief of snow surveys, one of the most influential jobs in a state where snow and the water that comes from it are big currency. He's on his monthly visit to one of a dozen snowpack-measuring stations scattered across the high country of the Sierra Nevada.
This is ALL THINGS CONSIDERED from NPR News. I'm Melissa Block.
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And I'm Audie Cornish. Now, the strange story of Tyrone Hayes. The biologist has devoted much of his career to studying a common herbicide used on corn, called atrazine; specifically, its effects on amphibians. Hayes believes the chemical impedes the sexual development of frogs, and he's publicly argued against the use of atrazine and criticized the corporation that makes it, Syngenta.