Rescue operations during the aftermath of the September 11 terrorist attack on the World Trade Center, New York City.… https://www.rawpixel.com/image/3978618/pdlocwtc-0076u-imagetifFree Image from public domain licenseCasualty transported by a stretcher during the September 11 terrorist attack on the World Trade Center, New York City.… https://www.rawpixel.com/image/3978617/photo-image-smoke-people-cityFree Image from public domain licenseRescue officers during the aftermath of the September 11 terrorist attack on the World Trade Center, New York City. Courtesy… https://www.rawpixel.com/image/3978706/pdlocwtc-0206u-imagetifFree Image from public domain licenseNYPD officer and NYPD car during the aftermath of the September 11 terrorist attack on the World Trade Center, New York… https://www.rawpixel.com/image/3978602/photo-image-paper-smoke-peopleFree Image from public domain license