Work on the National September 11 Memorial Museum has been halted over a budgetary dispute, delaying its opening, New York City Mayor Michael Bloomberg said.
The 9/11 memorial in New York opened less than four months ago and has seen more than one million visitors.
Ten years ago, on 9/11 -- one of the most devastating days in United States history -- the world had never seen an iPhone, sent a tweet, or updated a status on Facebook.
Photographer Marcus Robinson has spent the last five years of his life documenting the reconstruction of Ground Zero.
When you walk in, all you see is a construction site.
CNN's Sanjay Gupta reports on a study of firefighters that links dust inhaled on 9/11 to cancer.
Officials from New York and the United States Mint unveiled the 9/11 National Medal on Monday just three months before the 10th anniversary of the September 11 terrorist attacks.
Jon Stewart, host of "The Daily Show," was appointed to the board of directors of the National September 11 Memorial & Museum's board of directors.
After years of battles and negotiations, the 9/11 memorial nears completion. CNN's Deborah Feyerick reports.
There is new life at the World Trade Center site.