The son-in-law of Ayman al-Zawahiri

Ayman al-Zawahiri

Ayman Mohammed Rabie al-Zawahiri is an Egyptian physician, Islamic theologian and current leader of al-Qaeda. He was previously the second and last "emir" of the Egyptian Islamic Jihad, having succeeded Abbud al-Zumar in the latter role when Egyptian authorities sentenced al-Zumar to life...

, Abu Turab al-Urduni (also Abu Turab al-Jordani) is a Jordanian who has been described by the United States government as one of five individuals who were aware of the operational details of the September 11th attacks. The other four being Osama bin Laden

Osama bin Laden

Osama bin Mohammed bin Awad bin Laden was the founder of the militant Islamist organization Al-Qaeda, the jihadist organization responsible for the September 11 attacks on the United States and numerous other mass-casualty attacks against civilian and military targets...

, Khalid Sheik Mohammed, Ramzi bin al-Shibh, and Mohammed Atef

Mohammed Atef

Mohammed Atef was the alleged military chief of al-Qaida, although his role in the organization was not well known by intelligence agencies for years...

. US intelligence reports indicated that he was killed by US troops in 2001.

Training

He has been described as the trainer of the "muscle" hijackers at the al-Matar complex

Al-Matar complex

According to American counter-terrorism analysts the Al-Matar complex was an Afghan training camp run by al Qaeda.In 1999, Mohammed Atef met repeatedly with Bin Laden and Khalid Sheikh Mohammed at the Al-Matar complex to discuss possible targets for the 9/11 attacks.According to testimony offered...

 and training them to disarm air marshal

Air Marshal

Air marshal is a three-star air-officer rank which originated in and continues to be used by the Royal Air Force...

s, physical fitness and basic English phrases. He also prepared them for truck
bombing, blowing up buildings, and hijacking trains for operational security, so they wouldn't be able to reveal their target if they were captured.

At al-Faruq camp, he had each hijacker butcher a sheep and a camel with a Swiss army knife

Swiss Army knife

The Swiss Army knife is a brand of pocket knife or multi-tool manufactured by Victorinox AG and Wenger SA. The term "Swiss Army knife" was coined by US soldiers after World War II due to the difficulty they had in pronouncing the German name....

 to prepare them for using their knives during the hijackings.

Aftermath

CNN reports anonymous government sources as believing that Abu Turab Al-Urduni had been killed by U.S. forces during the first stages of the war in Afghanistan.

In September 2006, Abu Turab was shown in a video released by as-Sahab

As-Sahab

The As-Sahab Foundation for Islamic Media Publication , is the media production house of al-Qaeda, used to relay the organization's views to the world...

 that showed the training and preparations for the 2001 attacks. It also demonstrated that he had taught them how to falsify documents, and suggested that he had later died fighting in Kandahar

Kandahar

Kandahar is the second largest city in Afghanistan, with a population of about 512,200 as of 2011. It is the capital of Kandahar Province, located in the south of the country at about 1,005 m above sea level...

.