The U. S. Air Force, built the Green River Launch Complex, just outside of Green River, Utah, 1964. It was an annex of the U.S. Army’s White Sands Missile Range. From 1964 to 1973 the U. S. Air Force launched 141 Athena Missiles from the Green River launching area, near the Crystal Geyser as part of research to improve nuclear missiles. The site has since been decommissioned. Pershing and Athena rockets were fired from here to White Sands, NM, some 400 miles away.