9/11βs Visa Vetting Failures Were Fixed
The worst terrorist attack in world history occurred on September 11, 2001. Many security failures contributed to permitting the attacks to occur, including the inability of the legal immigration system to stop the 19 hijackers from receiving temporary nonimmigrant visas to travel to the United States. Fortunately, the system has improved, and vetting failures have become far less frequent after theΒ attacks.Β