John O'Neill (FBI agent)

John O'Neill was a dedicated FBI agent known for his expertise in counterterrorism and organized crime. He played a key role in investigating and preventing terrorist activities, including the early efforts against al-Qaeda. O'Neill was highly respected for his intelligence and commitment to national security. After leaving the FBI, he became head of security at the World Trade Center, where he continued his focus on terrorism. Tragically, he died in the September 11, 2001 attacks. His work significantly contributed to counterterrorism efforts before his death.