Al qaeda was a group just like isis this group was a terrosit group and was lead by osama been lattin. On sectember 11th citizens of newyork citite experienced a horrofiing experience when two planes struck the twin towers. Many people were killed. This news reached obama and he sent a group on navy to afghanistan to kill osama beenlattin the mission was sucsesfull and they killed him. Now the twin towers is replaced with the empire state building