The project — approved in 2015 following a lengthy review — has been touted as the biggest U.S. electricity infrastructure undertaking since the Hoover Dam was built in the 1930s.
Species gain this "lost" status when there hasn't been a trace of them in 10 years, according to the International Union for the Conservation of Nature.
In two very different stories about one of America's fastest-growing sports, we head to a 24-hour mountain bike relay race. Then we talk to some of the people behind a documentary about spreading mountain biking on the Navajo Nation.
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