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July 21, 2017

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In this Feb. 7, 2014 photo, a worker cultivates a special strain of medical marijuana known as Charlotte's Web inside a greenhouse, in a remote spot in the mountains west of Colorado Springs, Colo.

Brennan Linsley / AP

In this Feb. 7, 2014 photo, a worker cultivates a special strain of medical marijuana known as Charlotte's Web inside a greenhouse, in a remote spot in the mountains west of Colorado Springs, Colo.