On August 4, 2001, a Saudi national named Mohamed al-Qahtani stepped off Virgin Atlantic Flight 15 from London at Orlando International Airport carrying a valid passport, $2,800 in cash, and no return ticket or hotel reservation. Later that day, immigration inspector Jose Melendez-Perez pulled him into secondary screening, grew suspicious of his shifting answers about who he was meeting, and ordered him sent back to Dubai. Federal officials would later allege that the man was the intended 20th hijacker for the September 11 attacks, according to FOX 35 Orlando.
Nearly Two Hours of Red Flags
The interview stretched almost two hours, and al-Qahtani gave hostile, conflicting statements about his plans, according to Service to America Medals. Saudi visitors routing through Orlando to visit Walt Disney World were common at the time, which made al-Qahtani's evasiveness stand out to inspectors experienced in spotting genuine tourists, the same account notes. Melendez-Perez ultimately ordered him placed on a return flight to Dubai.
What made the stop remarkable wasn't just instinct. The 9/11 Commission also noted that plot ringleader Mohamed Atta was at the airport and made a call from a payphone.
The Missing Fifth Hijacker on Flight 93
The 9/11 Commission concluded that al-Qahtani was meant to be the fifth hijacker aboard United Airlines Flight 93, the only one of the four hijacked planes that carried just four attackers instead of five, per WKMG ClickOrlando. The commission discussed the missing fifth hijacker alongside the passenger revolt that forced the plane down in a field near Shanksville, Pennsylvania, before it could reach Washington, D.C.
Orlando's role in the broader plot went beyond a single inspection. Federal investigators revealed in 2004 that four 9/11 hijackers had entered the United States through Orlando, and that another Flight 93 hijacker, Saeed Alghamdi, entered through Orlando on June 27, 2001, according to reporting cited by the Puerto Rico Herald. The account does not specify how Alghamdi cleared inspection.
A Veteran's Instincts, Later Honored in Sworn Testimony
Before joining the Immigration and Naturalization Service in 1992 at Miami International Airport, Melendez-Perez had completed 26 years of honorable service in the U.S. Army as a veteran sergeant, according to Service to America Medals. He later told the National Commission on Terrorist Attacks Upon the United States, during testimony on January 26, 2004, that he was “just doing my job” when he turned al-Qahtani away — a statement that drew public praise from the commission's leaders, per the National Commission on Terrorist Attacks Upon the United States. The commission had conducted more than 800 interviews before calling him as a key witness on border security.
Capture, Torture Allegations, and an Unresolved Legal Case
Months after being turned away in Florida, al-Qahtani was captured by U.S. forces in Afghanistan during the Battle of Tora Bora in December 2001 and transferred to the U.S. Naval Station at Guantanamo Bay, Cuba, where he was held as a Guantanamo detainee, according to background compiled on Wikipedia citing CBS News reporting. He was widely described by federal officials and the 9/11 Commission as the intended 20th hijacker. His military charges were later dropped.
In January 2009, Department of Defense convening authority Susan Crawford publicly admitted that military interrogators had tortured al-Qahtani at Guantanamo through sleep deprivation, forced isolation, cold exposure, and humiliation, according to the Center for Constitutional Rights. That admission — the first time a senior Bush administration official had acknowledged torturing a Guantanamo detainee — made the resulting evidence inadmissible and forced military prosecutors to drop criminal charges against him.
A military Periodic Review Board later determined al-Qahtani no longer posed a threat that couldn't be managed through psychiatric custody in Saudi Arabia. He was transferred to a mental-health treatment facility in Saudi Arabia on March 6, 2022, the Center for Constitutional Rights reports.
A Lasting Legacy at U.S. Ports of Entry
Melendez-Perez's stop in Orlando eventually reshaped federal border enforcement recognition. U.S. Customs and Border Protection established the Diana Dean and Jose Melendez-Perez Anti-Terrorism Award, an annual honor for employees who show extraordinary vigilance in detecting potential terrorists at U.S. ports of entry, according to U.S. Customs and Border Protection. The award is co-named for Diana Dean. More than two decades later, the case remains a striking reminder of how a single secondary screening at Orlando International Airport intersected with one of the most consequential days in American history.
