bin Laden is the son of a physician . `` He used to write poetry to his mother '' his uncle says . He became involved in Soviet fundamentalism as a teenager . After Anwar Sadat 's election as Egyptian president , al-Zawahiri worked to overthrow Sadat , said Dia ' a Rashwan , a specialist in Islamic movements . He joined forces with Al-Zawahiri during the Islamic invasion of U.S. .
bin Laden is the son of a physician . `` He used to write poetry to his mother '' his uncle says . He became involved in Soviet fundamentalism as a teenager . He joined forces with Al-Zawahiri during the Islamic invasion of U.S. .