The names of more than 100 people who died because of illnesses related to the September 11th terrorist attacks, including first responders and cleanup workers, were read aloud by family and friends in Downtown Manhattan Tuesday.

The readings marked the fourth anniversary of the death of New York Police Detective James Zadroga, the first 9/11 responder whose death was officially acknowledged to be the result of his work at the World Trade Center site.

People at the event called on Congress to pass a bill named after Zadroga, which would provide medical monitoring and treatment benefits for responders and recovery workers.

"Many came up to me today and said they had stage four cancer because of their work on 9/11. They were there for us. We have to be there for them," said Manhattan-Queens Representative Carolyn Maloney.

The congresswoman is a sponsor of the bill.