11.   In the last year, scores of people have been massacred in Pakistan in attacks between rival Shiite and Sunni sects.

12.   Investigators believe members of the network belonged to the Takfir movement, a Sunni sect of Egyptian origin that preaches a radical form of Islam.

13.   Iran is overwhelmingly Shiite Muslim, while the Taliban imposes a fervently orthodox version of the mainstream Sunni sect.

14.   Investigators believe that members of the network belonged to the Takfir movement, a Sunni sect of Egyptian origin that preaches a radical form of Islam.

15.   Iran, which is predominately Shiite Muslim, has been suspicious of the rise of the conservative Taliban, who adhere to the Sunni sect of Islam.

16.   Like President Saddam Hussein, most important people in the government and the military belong to the mainstream Sunni sect of Islam.

17.   Most Afghans belong to the Sunni sect of Islam, which is the predominant sect of the Taliban as well.

18.   Most Iranians are Shiite Muslims, while most Taliban soldiers belong to the majority Sunni sect of Islam.

19.   Most Iranians belong to the Shiite sect of Islam, while most Saudis follow the mainstream Sunni sect.

20.   Most Muslims in the Arab world belong to the mainstream Sunni sect.