What major attacks has al-Qaeda been responsible for?
The group has targeted American and other Western interests as well as Jewish targets and Muslim governments it saw as corrupt or impious — above all, the Saudi monarchy. Al-Qaeda linked attacks include:

The May 2003 car bomb attacks on three residential compounds in Riyadh, Saudi Arabia
The November 2002 car bomb attack and a failed attempt to shoot down an Israeli jetliner with shoulder-fired missiles, both in Mombasa, Kenya
The October 2002 attack on a French tanker off the coast of Yemen Several spring 2002 bombings in Pakistan
The April 2002 explosion of a fuel tanker outside a synagogue in Tunisia
The September 11, 2001, hijacking attacks on the World Trade Center and the Pentagon
The October 2000 U.S.S. Cole bombing
The August 1998 bombings of the U.S. embassies in Nairobi, Kenya, and Dar es Salaam, Tanzania
Al-Qaeda is suspected of carrying out or directing sympathetic groups to carry out the May 2003 suicide attacks on Western interests in Casablanca, Morocco; the October 2002 nightclub bombing in Bali, Indonesia; and the 1993 World Trade Center bombing.