Ground zero workers who are still suffering from World Trade Center smoke and dust held a vigil Thursday outside the hospital where one of their colleagues — a retired New York City police officer — is awaiting a lung transplant.

“I want the federal government to give money to not just research, but to treat and cure these people,” said James Zadroga, whose 34-year-old son, a retired police detective also named James Zadroga, died of pulmonary disease one year ago after spending hundreds of hours in rescue and recovery efforts after Sept. 11, 2001.