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National parks are a big source of local pride, but about half the U.S. states don't have one. Oklahoma is among the park-less, but it wasn't always that way.
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The National Park Service turns 100 this year, and many states are celebrating top-tier environmental landmarks that are a big source of local pride.…
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Sally Jewell, who oversees agencies including the National Park Service, discusses some of the efforts underway, and biggest challenges.
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A new report from the National Parks Service shows that more than 1 million people visited Oklahoma's national parks in 2013 and spent $17.2…