If you've flown into Washington, you must have seen the Pentagon. To many, the eight-sided building has come to symbolize much of what has gone wrong with the country.

Explanation:

Following the terrorist attack by Al-Qaeda on the pentagon, which is the Headquarter of the United States Department of Defense in September 11, 2001, for most people, the pentagon no longer exudes confidence of the American military and defense rather, it now represents the failure of the American Ministry apparatus to fully protect it's citizens and prevent terrorist attacks in their home soil.

b) the confederacy had to pay all union war expenses.