The story of how it got there may never be known, but a rusting 132-year-old Winchester rifle -- known in U.S. lore as "the gun that won the West" -- was recently found resting against a juniper tree in a Nevada national park. The gun, its stock split, gray and faded like driftwood, and its steel barrel rusted brown, blended in perfectly against the tree in a remote part of the Great Basin National Park until a National Parks Service employee spotted it. “The rifle, exposed for all those years to sun, wind, snow and rain, was found leaning against...