VIDEO: The number of first responders who have died from 9/11-related illnesses now almost equals the number of firefighters who died during the terror attacks themselves. A total of 341 New York City Fire Department firefighters, paramedics and civilian support staff who died from post-911 illnesses are now memorialized at the FDNY World Trade Center Memorial Wall, according to the Uniformed Firefighters Association. The memorial commemorates both first responders who died during the attacks and those who died from related illnesses in the years since. That count almost equals the 343 New York firefighters who died during the 2001 attacks. The fire department added 43 names to the memorial on September 6, according to a news release.