Here's one of the news stories about it, mentioning a British government report into the intelligence they had around September 11 and usage of MS Flight Simula

Here's one of the news stories about it, mentioning a British government report into the intelligence they had around September 11 and usage of MS Flight Simulator. (Apologies for a Daily Mail link, it's the only one I could find with some quick Googling, but it was commonly reported at the time.) https://www.dailymail.co.uk/news/article-357006/The-flight-software-trains-terrorists.html https://www.dailymail.co.uk/news/article-357006/The-flight-s...