In the 1950s, one of the largest uranium deposits in the U.S. was found near Moab, Utah. The Department of Energy began cleaning up the uranium mill tailings from the Moab Site in April 2009, using steel containers to transport more than five million tons of tailings for safe disposal near Crescent Junction, Utah. In this May 2012 photo, one of the trains is shown on the Union Pacific Railroad in Utah, passing a butte capped by a familiar southwest U.S. rock formation known as Navajo Sandstone. | Photo courtesy of the Department of Energy.

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