Why did al qaeda attack the twin towers in 1993?

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

some women in the middle and upper classes worked as doctors, government officials, or priestesses. both women and men enjoyed a better quality of life the higher they were on the social pyramid. the egyptians believed that their class system created a stable, well-ordered society. each group had its own role to play.