Immediately after 9/11, investigators began piecing together the plot. In the flight manifests, they discovered a pattern: A team of five terrorists hijacked every plane that day, except for one. United Airlines Flight 93 had only four hijackers. Investigators believed one person was missing from that group.Who was the 20th hijacker — if there even was one? And is there a 9/11 hijacker still on the loose? 

Podden och tillhörande omslagsbild på den här sidan tillhör Long Lead & Campside Media. Innehållet i podden är skapat av Long Lead & Campside Media och inte av, eller tillsammans med, Poddtoppen.