Simplify the following text for a Grade 14 native English-speaking person.
Original: Waleed Mohammed al-Shehri ( , WalÄ `` d ash-Shehr Ä `` , also transliterated as Alshehri ) ( December 20 , 1978 â `` September 11 , 2001 ) was one of five hijackers of American Airlines Flight 11 , which was crashed into the North Tower of the World Trade Center as part of the September 11 attacks .
Simplified: Waleed M. al-Shehri ( Arabic : Ø Ù Ø Ù Ø Ù , also transliterated Alshehri ) was named by the FBI as a hijacker of American Airlines Flight 11 from Boston to Los Angeles that crashed into the World Trade Center as part of the September 11 , 2001 attacks .