Youth Conservation Corps (YCC) interns doing trail construction on the .

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Photo credit: © Natural History Archive / Alamy / Afripics
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Keywords: america, american, california, colorado, conservation, corps, country, desert, discovery, history, joshua, land, lands, mojave, monument, national, natural, nature, np, park, parks, preserve, public, service, trail, trails, tree, usa, widlife, wilderness, ycc, youth