This second-by-second chronology of the shooting at Marjory Stoneman Douglas High School in February 2018 is the culmination of months of investigative reporting, dozens of public-records requests and analysis of hundreds of pages of documents. Through the use of animations, graphics, video and audio, the conclusion is undeniable: Police and educators weren’t ready for the enormity of the tragedy, and their failures cost the lives of 17 children and teachers.
