Alcove dedicated to the terrorist attack on the Pentagon in Washington, D.C. (Photo: Jin Lee. Courtesy of the National 9/11 Memorial & Museum) I don’t know what the museum could have done better ...

Roger Marshall of Kansas appeared to confirm mass casualties as he said, "when one person dies it's a tragedy, but when many, ...

Our 21st-Century Architecture: 25 Years 25 Buildings pick for 2011 is the National 9/11 Memorial, designed by Michael Arad of Handel Architects – a powerful symbol of loss, remembrance and healing.

The two waterfall pools at the 9/11 Memorial serve as the centerpiece of one of the most iconic monuments in the United States. These striking pools, each spanning roughly an acre, occupy the ...

The National September 11 Memorial ... The memorial welcomes visitors daily from 8 a.m. until 8 p.m.; the museum is open Wednesday through Monday and select Tuesdays from 9 a.m. to 7 p.m ...

A recent decision to close the Top of the World Observation Deck on the 27th floor of the Baltimore World Trade Center raises ...

Twenty-three years later, Khalid Sheikh Mohammed and two other men accused of plotting the attack - known as 9/11 - are expected ... the nation's capital, Washington DC. The fourth plane crashed ...

but it is only staffed by National Park Service rangers every day from 9:30 a.m. to 10 p.m. For further details, consult the National Park Service's official World War II Memorial page.