The National Sept. 11 Memorial & Museum at the World Trade Center will cost $60 million a year to operate once the roughly $700 million project is complete. Just operating the fountains marking the spots where the twin towers once stood will cost $4.5 million to $5 million annually. (Associated Press)

The National Sept. 11 Memorial & Museum at the World Trade Center will cost $60 million a year to operate once the roughly $700 million project is complete. Just operating the fountains marking the spots where the twin towers once stood will cost $4.5 million to $5 million annually. (Associated Press)