More than 2,700 people were killed in the World Trade Center attacks, and each one had their names read aloud during an hours-long memorial ceremony Wednesday morning at the Ground Zero memorial site.

"Ground Zero Supertower" examines the new skyscraper ... the construction of the National September 11 Memorial Museum that will house almost a thousand artifacts from that devastating day.

Steel from Ground Zero, once housed in a North Carolina Museum ... it now stands as a lasting memorial to the tragic event.

"Ground Zero Supertower" examines the new skyscraper ... the construction of the National September 11 Memorial Museum that will house almost a thousand artifacts from that devastating day.

The National September 11 Memorial & Museum serves as the primary tribute to the nearly 3,000 victims of the 2001 terrorist attacks, as well as the six lost in the 1993 bombing. The memorial's ...