NEW YORK, New York ( WCBS ) -- In the 24 years since the 9/11 terror attacks, over 1,600 victims have been identified, but there are 1,100 more who remain unidentified.

Scientists say the commitment they made in 2001 to bring everyone home has not been forgotten.

The search for remains after 9/11

On Sept. 11, 2001, Mark Desire was at the World Trade Center site with the Office of the Chief Medical Examiner to preserve evidence and set up a temporary morgue when the South Tower collapsed.

"I thought I was dead. I thought that was it," he said.

He ran as the tower fell, was hit by debris and went crashing through a window, suffering several injuries.

He came to work the next day on crutches and was put in charge of doing DNA identifications at Ground Zero.

"To do proper searching,

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