Hazmi, along with at least five other future hijackers, traveled to Las Vegas, Nevada at least six times in the summer of 2001.
According to Tawfiq bin Attash, Omari was one of a group of future hijackers who provided security at Kandahar airport after their basic training at an al-Qaeda camp.
Many of the future hijackers attempted to hide their radicalism and blend in with the population.
None of these future hijackers was a pilot.
His sermons are attended by two future 9/11 hijackers, Khalid al-Mihdhar and Nawaf al-Hazmi.
According to the homeowner, the future hijackers moved in on May 10, 2000.
The future hijackers usually arrived in groups of two or three, staying at the safe house for as long as two weeks.
Ali apparently assisted nine future hijackers between April and June 2001 as they came through Dubai.
While there he probably associated with the radical Saudi cleric named Sulayman al-Alwan as several other future hijackers had.
An associate of a senior Hezbollah operative was on the same flight that took the future hijackers to Iran.