The National September 11 Memorial & Museum held its annual commemoration ceremony to observe the 24th anniversary of the 9/11 terror attack.
Officials say the completion of the building will be the final milestone in the commercial buildout of the World Trade Center campus.
The campaign targets the roughly 100 million Americans who were not alive on Sept. 11, 2001 -- those who never witnessed the terrorism and heroism, and never experienced the service and sacrifice of that day.
The money would fund a report about 9/11-related toxins by the Department of Investigation.
James Riches spent six months at ground zero digging through the rubble to find the body of his son, Jimmy, who was also a firefighter.
Steel recovered from the World Trade Center is part of the ship named after the 9/11 hero who served in the Marines, the Coast Guard and the NYPD.