Omar Khadr is the only Canadian to be held at the U.S. detention centre for terror suspects at Guantanamo Bay, Cuba.

The teen's pre-trial hearing on murder charges marks the latest chapter in the murky saga of the Khadr clan, who have often been referred to as Canada's 'al Qaeda family.'

Born to Arab parents who emigrated to Canada from Egypt in 1977, the six Khadr children grew up mostly in Afghanistan and Pakistan during the 1980s and 1990s.

They were reared in an atmosphere of religious and political extremism that was hostile to Western values.

As a family, they reportedly once spent a month living in Osama bin Laden's Afghan compound and the al Qaeda mastermind even attended eldest daughter Zaynab Khadr's wedding.

The four sons also attended al Qaeda training camps in Afghanistan.

After the Sept. 11, 2001 terror attacks, the Khadr family fled Afghanistan when U.S. forces invaded.

Family patriach Ahmed Said Khadr, who was a reputed al Qaeda financier and friend of bin Laden, was killed in a gun battle in Pakistan in 2003.

The youngest son, Karim, was paralysed in the same attack that killed his father. He returned to Canada with his mother in April 2004 to get medical treatment.

Another son, Abdurahman, spent more than a year in U.S. custody before being allowed to return to live in Canada.

Meanwhile, the extradition hearing for eldest son Abdullah has been put over until Feb. 2.

Both Khadr daughters live in Toronto.

Ahmed Said Khadr

• Born in Egypt, moved to Canada in 1977
• Accused of being a founding member and financier of al Qaeda. Was often described as the highest ranking of al Qaeda's Canadian operatives.
• Placed on a list of suspected terrorists after the Sept. 11, 2001, terror attacks
• Killed in a shootout with Pakistani forces near the Afghanistan border in 2003

Maha Khadr

• Ahmed Said Khadr's wife
• Born in Palestine, moved to Canada
• Married Ahmed Said Khadr in Canada
• Moved with husband and children to Afghanistan in the 1980s

• Said she did not want to raise her children in Canada because they would have got involved in 'drugs and homosexual relationships.' Enrolled her sons in al Qaeda training camps

Zaynab Khadr

• Single mother, returned to live in Canada in February 2005 
• Accused of being involved with her brother, Abdullah, in running an al Qaeda training camp in Afghanistan in the 1990s

Abdullah Khadr, 24 

• Information from the Taliban released on Feb. 4, 2004, suggested he may have been the suicide bomber who killed a Canadian soldier in Kabul in January 2004
• Denied accusations of running an al Qaeda training camp in Afghanistan in the 1990s
•  Returned to Canada on Dec. 7, 2005 after he was released from custody in Pakistan where he had been held for a year. Unclear who held him and why he was released.
• Arrested in Toronto on Dec. 17, 2005 at the request of U.S. authorities and denied bail
• Court documents say Khadr is wanted in Massachusetts on charges of conspiracy to murder Americans outside the United States. He is accused of purchasing $20,000 US in mortar rounds, landmine materials, grenades and ammunition for AK-47s for al Qaeda militants in eastern Afghanistan

Abdurahman Khadr, 22

• Arrested as a suspected member of al Qaeda in November 2001
• Transferred to Guantanamo Bay in 2003
• Claims he briefly worked for the CIA as an informant in Guantanamo Bay
• Released and sent to Afghanistan in July 2003
• Admitted in a television interview that he was "raised to become a suicide bomber" 
• Returned to Canada late 2003 where he is fighting a court case with the government to obtain a passport

Omar Khadr, 19

• Detained in 2002 and accused of killing a U.S. medic in Afghanistan during a 2002 gun battle
• Being held in Guantanamo Bay awaiting trial

Abdul Karim Khadr, 15

• Paralysed from the waist down in the same 2003 battle that killed his father
• Returned to Canada in April 2004 to seek medical treatment and is now living in Toronto with his mother