USA:Nina Simone(1933-2003)

I choose No.4
No.4 is "What have been the effects of the 9/11 attacks on the US and other countries ?"
For the United States, this incident was transition stage.
American public agreed attacking on the state sponsors of terrorism.
President's approval rating at the time become about 90％
But the country which supported attacking Iraq by America changed regime, because Terrorism was occurred frequently by  Islamist extremists in the country.
Airlines around the world was damaged by demand for air travel decreased.

Of course,there are more damage.
But, these effect is the most obvious damage.