FBI agent Pellegrino; "But there were missed opportunities before. And you always have to wonder what else could have been done to possibly have picked him up. And if we had picked him up, I just, I can't imagine that an event like 9-11 would have happened." CBS. Sep 11, 2026. How '9/11 mastermind' slipped through FBI's fingers. BBC. Sep 5, 2021. Mohammed seems to have been tipped off about the US interest in him and fled Qatar, ending up in Afghanistan.''