Since nobody learned what you learned you're going to have to do this one on your own sorry :/
They discovered the New World by accident. They were looking for new routes that would take them quicker to Asia to trade. At the time they did not know the earth was round. They believed it was flat and would sail straight to Asia. Therefore, when Colombus hit the New World he called the natives Indians because he believed he had reached India.
If you are asking what 9/11 was about, it was the day when the twin towers got hit by 2 planes, and was stated as a terroist attack.
