Marking the 20th anniversary of the 9-11 attacks, the ATLAS tower will shine blue for a week, beginning at 12 AM on Saturday, September 11. Reflecting the color of the perfectly clear skies over New York on the morning of the attacks, blue was selected by the National September 11 Memorial Museum's "Tribute in Light" art installation, and in their iconic mural, “Trying to Remember the Color of the Sky on That September Morning," by artist Spencer Finch.