On this day: May 20, 1899

May 20, 2010 12:00 AM

UPDATED April 28, 2010 03:33 PM

More Videos

  • Workers take down Plutonium Reclamation Facility Canyon

    This video from November shows demolition of the north wall of the canyon, allowing heavy equipment to begin removing strong backs from the walls. Strong backs are brackets from which pencil-shaped processing tanks once hung. It also shows the array of dust suppression tools, each spraying water from a different angle to help control radiological contamination during demolition.