[[Fire Department of New York City]] (FDNY) indsatte hurtigt 200 indsatshold (halvdelen af afdelingen) til at arbejde på Ground Zero.<ref name="mckinsey-ems">{{cite web |url=http://www.nyc.gov/html/fdny/pdf/mck_report/ems_response.pdf |title=McKinsey Report – Emergency Medical Service response |publisher=FDNY / McKinsey & Company |date=9. august 2002 |access-date=12. juli 2007 |format=PDF |archive-date=25. december 2018 |archive-url=https://web.archive.org/web/20181225172600/http://www.nyc.gov/html/fdny/pdf/mck_report/ems_response.pdf%20 |url-status=dead }}</ref><ref name="mckinsey-exec">{{cite web |url=http://www.nyc.gov/html/fdny/pdf/mck_report/executive_summary.pdf |title=FDNY McKinsey Report – Executive Summary |date=august 2002 |publisher=FDNY / McKinsey & Company |access-date=10. juli 2007 |format=PDF |archive-date=25. december 2018 |archive-url=https://web.archive.org/web/20181225172049/http://www.nyc.gov/html/fdny/pdf/mck_report/executive_summary.pdf%20 |url-status=dead }}</ref><ref>{{cite web |url=http://www.nyc.gov/html/fdny/pdf/mck_report/x7_fire_apparatus_deployment.pdf |title=Fire Apparatus Deployment on September 11 |publisher=FDNY / McKinsey & Company |date=august 2002 |access-date=10. juli 2007 |format=PDF |archive-date=25. december 2018 |archive-url=https://web.archive.org/web/20181225172548/http://www.nyc.gov/html/fdny/pdf/mck_report/x7_fire_apparatus_deployment.pdf%20 |url-status=dead }}</ref> [[New York City Police Department]] (NYPD), sendte folk fra [[Emergency Service]] (ESE) og andre politifolk af sted.<ref name="mckinsey-nypd">{{cite web |url=http://www.nyc.gov/html/fdny/html/mck_report/toc.html |title=McKinsey Report – NYPD |date=19. august 2002 |access-date=10. juli 2007 |archive-date= 8. juni 2014 |archive-url=https://web.archive.org/web/20140608101241/http://www.nyc.gov/html/fdny/html/mck_report/toc.html |url-status=dead }}</ref>
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