The site is usually closed to the public. But twice a year, in April and October, the site opens to spectators.FILE - Scientists rig the world's first atomic bomb to raise it up onto a 100-foot tower at the Trinity Test Site. WHITE SANDS MISSILE RANGE, N.M.
Visitors also are being warned to come prepared as Trinity Site is in a remote area with limited Wi-Fi and no cell service or restrooms.
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