Original: Mohamed Mohamed el-Amir Awad el-Sayed Atta ( , Mu ammad ` A a as-Sayyid ) ( September 1 , 1968 - September 11 , 2001 ) was one of the masterminds and the ringleader of the September 11 attacks who served as the hijacker-pilot of American Airlines Flight 11 , crashing the plane into the North Tower of the World Trade Center as part of the coordinated attacks .
Simplified: He personally participated in the hijacking of American Airlines Flight 11 , the first plane to crash into the World Trade Center during the September 11 , 2001 attacks .