Founded by Osama bin Laden, which was considered the most dangerous international terrorist group in the 1990s and early 2000s?

Osama bin Laden founded al-Qaeda, an international terrorist organization responsible for major attacks in the 1990s and early 2000s. The Taliban is a separate group, ISIS emerged later, and the Ku Klux Klan is a domestic extremist group in the United States. The correct choice is al-Qaeda.

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