Sluice Boxes State Park, Mont., panoramic composed of six pictures taken from a protruding cliff side halfway through the valley May 2. Remains of old prospector cabins, historic railroads and mines can be seen from the trails that line the river at the bottom of the canyon. (U.S. Air Force photo illustration/Airman 1st Class Collin Schmidt)
Airman 1st Class Collin Schmidt
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