Usama ibn Mohammed ibn Awad ibn Ladin (Arabic: 'sm@ bn mHmd bn `wD bn ldn, usamah ibn muhammad ibn 'awad ibn ladin), often anglicized as Osama bin Laden (; March 10, 1957 - May 2, 2011), was a founder of al-Qaeda, the organization responsible for the September 11 attacks in the United States and many other mass-casualty attacks worldwide. He was a Saudi Arabian until 1994 (stateless thereafter), a member of the wealthy bin Laden family, and an ethnic Yemeni Kindite. Bin Laden's father was Mohammed bin Awad bin Laden, a Saudi billionaire from Hadhramaut, Yemen. His mother, Alia Ghanem, was from a secular middle-class family based in Latakia, Syria.

There is no universally accepted standard for transliterating Arabic words and Arabic names into English; however, bin Laden's name is most frequently rendered "Osama bin Laden". The FBI and Central Intelligence Agency (CIA), as well as other U.S. governmental agencies, have used either "Usama bin Laden" or "Usama bin Ladin". Less common renderings include "Ussamah bin Ladin" and, in the French-language media, "Oussama ben Laden". Other spellings include "Binladen" or, as used by his family in the West, "Binladin". The decapitalization of bin is based on the convention of leaving short prepositions, articles, and patronymics uncapitalized in surnames; the nasab bin means "son of". The spellings with o and e come from a Persian-influenced pronunciation also used in Afghanistan, where bin Laden spent many years.  Osama bin Laden's full name, Osama bin Mohammed bin Awad bin Laden, means "Osama, son of Mohammed, son of Awad, son of Laden". "Mohammed" refers to bin Laden's father Mohammed bin Laden; "Awad" refers to his grandfather, Awad bin Aboud bin Laden, a Kindite Hadhrami tribesman; "Laden" refers not to bin Laden's great-grandfather, who was named Aboud, but to Aboud's father, Laden Ali al-Qahtani.  The Arabic linguistic convention would be to refer to him as "Osama" or "Osama bin Laden", not "bin Laden" alone, as "bin Laden" is a patronymic, not a surname in the Western manner. According to bin Laden's son Omar bin Laden, the family's hereditary surname is "al-Qahtani" (Arabic: lqHTny, al-Qahtani), but bin Laden's father, Mohammed bin Laden, never officially registered the name.  Osama bin Laden had also assumed the kunyah "Abu 'Abdallah" ("father of Abdallah"). His admirers have referred to him by several nicknames, including the "Prince" or "Emir" (l'myr, al-Amir), the "Sheik" (lshykh, as-Saykh), the "Jihadist Sheik" or "Sheik al-Mujahid" (shykh lmjhd, Saykh al-Mujahid), "Hajj" (Hj, Hajj), and the "Director". The word usamah ('sm@) means "lion", earning him the nicknames "Lion" and "Lion Sheik".  Osama bin Mohammed bin Awad bin Laden was born in Riyadh, Saudi Arabia, a son of Yemeni Mohammed bin Awad bin Laden, a billionaire construction magnate with close ties to the Saudi royal family, and Mohammed bin Laden's tenth wife, Syrian Hamida al-Attas (then called Alia Ghanem). In a 1998 interview, bin Laden gave his birth date as March 10, 1957.  Mohammed bin Laden divorced Hamida soon after Osama bin Laden was born. Mohammed recommended Hamida to Mohammed al-Attas, an associate. Al-Attas married Hamida in the late 1950s or early 1960s, and they are still together. The couple had four children, and bin Laden lived in the new household with three half-brothers and one half-sister. The bin Laden family made $5 billion in the construction industry, of which Osama later inherited around $25-30 million.  Bin Laden was raised as a devout Sunni Muslim. From 1968 to 1976, he attended the elite secular Al-Thager Model School. He studied economics and business administration at King Abdulaziz University. Some reports suggest he earned a degree in civil engineering in 1979, or a degree in public administration in 1981. One source described him as "hard working"; another said he left university during his third year without completing a college degree. At university, bin Laden's main interest was religion, where he was involved in both "interpreting the Quran and jihad" and charitable work. Other interests included writing poetry; reading, with the works of Field Marshal Bernard Montgomery and Charles de Gaulle said to be among his favorites; black stallions; and association football, in which he enjoyed playing at centre forward and followed the English club Arsenal  At age 17 in 1974, bin Laden married Najwa Ghanem at Latakia, Syria; they were separated before September 11, 2001. Bin Laden's other known wives were Khadijah Sharif (married 1983, divorced 1990s); Khairiah Sabar (married 1985); Siham Sabar (married 1987); and Amal al-Sadah (married 2000). Some sources also list a sixth wife, name unknown, whose marriage to bin Laden was annulled soon after the ceremony. Bin Laden fathered between 20 and 26 children with his wives. Many of bin Laden's children fled to Iran following the September 11 attacks and as of 2010, Iranian authorities reportedly continue to control their movements.  Nasser al-Bahri, who was bin Laden's personal bodyguard from 1997-2001, details bin Laden's personal life in his memoir. He describes him as a frugal man and strict father, who enjoyed taking his large family on shooting trips and picnics in the desert.  Bin Laden's father Mohammed died in 1967 in an airplane crash in Saudi Arabia when his American pilot Jim Harrington misjudged a landing. Bin Laden's eldest half-brother, Salem bin Laden, the subsequent head of the bin Laden family, was killed in 1988 near San Antonio, Texas, in the United States, when he accidentally flew a plane into power lines.  The FBI described bin Laden as an adult as tall and thin, between 1.93 m (6 ft 4 in) and 1.98 m (6 ft 6 in) in height and weighing about 73 kilograms (160 lb), although the author Lawrence Wright, in his Pulitzer Prize-winning book on Al-Qaeda, The Looming Tower, writes that a number of bin Laden's close friends confirmed that reports of his height were greatly exaggerated, and that bin Laden was actually "just over 6 feet (1.8 m) tall". Eventually, after his death, he was measured to be around 1.93 m (6 ft 4 in). Bin Laden had an olive complexion and was left-handed, usually walking with a cane. He wore a plain white keffiyeh. Bin Laden had stopped wearing the traditional Saudi male keffiyeh and instead wore the traditional Yemeni male keffiyeh. Bin Laden was described as soft-spoken and mild-mannered in demeanor.

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