Every Feb. 10 — the day she died of lung disease — Jones lays flowers at her grave in Staten Island. On Sept. 11 — the day the World Trade Center collapsed and she inhaled the toxic dust cloud that enveloped lower Manhattan — Jones watches television at home, listening to 2,749 names of the financial workers, firefighters, parents and children who were killed in the attack.

For the first time on Tuesday, Jones is going to a small park southeast of ground zero, where he will stand for hours with those victims' families marking the sixth anniversary and hear the name of his wife, Felicia Dunn-Jones, who died just five months after the towers fell. He is not sure how he will feel.

"It's just a sense of sadness, really," he said. "It's just a sense of acknowledgment that ... her death was caused by events happening that day."

The addition of Dunn-Jones, a 42-year-old civil rights attorney, to New York City's Sept. 11 death toll occurred in a year that sharply focused on post-Sept. 11 illness — and the legacy of the cleanup of ground zero — more than ever before.

That legacy was painfully altered by the unearthing of several hundred human remains from streets and sewer lines around the trade center site, which officials acknowledged were missed the first year. Doctors published more studies establishing direct links to respiratory illnesses and the exposure to the mixture of pulverized concrete, asbestos, mercury and other toxins that wafted over ground zero for close to a year. One study showed a powerful connection to sarcoidosis — the lung-scarring disease that killed Dunn-Jones — and city firefighters.

"I don't think anyone's questioning any more how many thousands of people are sick," said David Worby, who represents close to 10,000 plaintiffs suing the city and contractors who oversaw ground zero's cleanup. More than 100 of his plaintiffs have died, he says.

City officials have argued that more research is needed before the true health effects of Sept. 11 can be proven. But they significantly changed their position this year, commissioning a health panel that concluded in February that treating the ailments of exposed workers could cost close to $400 million a year. (…)

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