Photos: The National September 11 Memorial Museum
A museum memorializing the September 11, 2001, attacks is open to the public after eight years of work designing the exhibits, collecting artifacts and settling disputes over how best to document the day when hijacked planes slammed into the World Trade Center, the Pentagon and a field near Shanksville, Pennsylvania, killing nearly 3,000 people.
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The museum hosts an art installation by Spencer Finch, composed of 2,983 individual watercolor drawings, honoring each of the people killed in the Sept. 11 attack. The various shades of blue represent the color of the sky that day.