Mohamed Atta
Mohamed Mohamed el-Amir Awad el-Sayed Atta ( ; ""  ; September 1, 1968 – September 11, 2001) was an Egyptian hijacker and one of the ringleaders of the September 11 attacks in which four United States commercial aircraft were commandeered with the intention of destroying specific civilian targets. He served as the hijacker-pilot of American Airlines Flight 11 and crashed the plane into the North Tower of the World Trade Center as part of the coordinated attacks. At 33 years of age, he was the oldest of the 19 hijackers who took part in the attacks.
Mohamed Atta's alleged Prague connection
Mohammed Atta, an Egyptian national, came with Abu Ammer [the real name behind this Arabic alias remains a mystery] and we hosted him in Abu Nidal's house at al-Dora under our direct supervision.
We arranged a work program for him for three days with a team dedicated to working with him ... He displayed extraordinary effort and showed a firm commitment to lead the team which will be responsible for attacking the targets that we have agreed to destroy.