The attacks of September 11, 2001, were preceded by attacks in 1998 on American embassies in Tanzania and Kenya.
In the attacks of September 11, 2001 or the attacks of 9/11 the terrorist hijacked the many airlines. Along with hijacking, the human bomber attacks committed on this date.
Attacks in 1998 on American embassies:
Thus, the attacks of September 11, 2001, were preceded by attacks in 1998 on American embassies in Tanzania and Kenya.
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