ADVANCE FOR WEEKEND EDITIONS, MAY 20-21 - In this May 9, 2017 photo, Bitterroot National Forest packer Karl Crittenden smiles as Ziggy responds to light pull on the lead rope at the Bitterroot National Forest's West Fork Ranger Station in Hamilton, Mont. Crittenden said the ground work he puts in now will pay dividends when the pair are miles away from the nearest trailhead this summer. Ziggy is one of two mustangs from a Nevada prison program. (Perry Backus/Ravalli Republic via AP)
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