The National September 11 Memorial Museum opened, seven stories below the ground where the World Trade Center towers once stood.
The National September 11 Memorial Museum opened May 21, 2014, more than 12 years after the terrorist attacks that destroyed lower Manhattan, severely damaged the Pentagon, and killed nearly 3,000.
The museum tells the story of the 9/11 attacks and preserves the memories of the victims in a 110,000 square foot exhibition space.
In a somber dedication ceremony May 15, 2014, President Barack Obama dedicated the museum at bedrock, seven stories below the ground where the World Trade Center towers once stood. Other dignitaries in attendance at the dedication included former NYC Mayors Rudolph Giuliani and Michael Bloomberg, Governors Chris Christie and Andrew Cuomo, and current NYC Mayor Bill de Blasio.