publication date: Thursday, September 9, 2021 (part of Fall 2021)

category: Mysteries

clue: Conspiracy theories that focused on who had advance knowledge of the 9/11 attacks have often involved this FBI counter-terrorism expert, who investigated the 1993 WTC bombing and expected it to happen again.

explanation: O'Neill was an FBI agent who was involved in numerous counter-terrorism investigations. He was driven out of the agency in August 2001 and took a job as the head of security at the World Trade Center, remarking to a nervous friend that he expected the same terrorists to come back and "finish the job." more…

intended difficulty: hard

solved by: Russ Wilhelm, Steve West, LaVonne Lemler, Samir Mehta, Chris Lemler, Richard Slominsky, Matthew Preston, Denise Sawicki, Erik Bates, and Aaron Shurtleff

Never Forgotten: The tragic terrorist attacks of September 11, 2001 changed the world in many ways, not least by robbing it of so many decent people whose loss will never be forgotten. As America marks the twentieth anniversary of 9/11, here's remembering seven of the souls lost that day, may they rest in peace.

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