President Barack Obama has dedicated a new museum in New York City that preserves the memory of the September 11, 2001 terrorist attacks in the United States.
President Obama Dedicates 9/11 Museum

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A somber crowd watches President Obama giving a speech on a projection screen during the dedication ceremony of the National September 11 Memorial Museum, in New York City, May 15, 2014.

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Members of the public watch a projection screen at the World Trade Center Plaza during the dedication ceremony of the National September 11 Memorial Museum, New York City, May 15, 2014.