Take a tour of the 9/11 museum before it opens next year.  See artifacts from the September 11th attacks on the World Trade Center which will be part of the permanent collection at the National September 11 Memorial & Museum.  There's pieces of steel from the original World Trade Center, firetrucks from the site and the 'Survivor Staircase;' the actual stairs hundreds used to escape before the towers fell.

The museum is expected to be open next Spring after several delays.  It'll be 7 floors below ground and will not only focus on the thousands of lives lost in the attacks but those who were responsible.

The Sept. 11 Memorial opened on the 10th anniversary of the attacks.  It's twin reflecting pools are largest man-made waterfalls in North America and sit where the Twin Towers once stood. The names of every person who died in the 2001 attacks as well as the six people killed in the World Trade Center bombing in February 1993 are inscribed on bronze panels around the pools.

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September 11th Tribute Music

Ron Agam/Getty Images Can you believe its been 11 years since the world stopped turning? It seems like yesterday we were attacked by terrorists. Let us not forget the first responders who rushed to the scene at the World Trade Center and the Pentagon, the people who lost their lives on that fateful day and the men and women in uniform who fight for our freedom everyday.