Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
The first semi-permanent settlements appeared in Florida around 5000 B.C.
10

The US national public health institute, Centers for Disease Control and Prevention, has an actual plan in case of zombie invasion.
29
The United States does not have an official language.
88
There are two credit cards for every person in the United States.
2


