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New York City under Mayor Mamdani released 170,000 documents that officials say show authorities knew the air quality around the World Trade Center site after 9/11 was dangerous but failed to warn local residents. The release comes as the 25th anniversary of the attacks nears and has reignited scrutiny of the city's post-9/11 public health response. In the wake of the document release, New York City firefighters are now demanding answers, saying the records reveal how toxic the air truly was following the attacks and questioning why warnings were withheld from responders and residents at the time. The firefighters' union is pressing city officials for further accountability as the anniversary approaches.