Human: What are some of the most interesting facts about the United States? Assistant: 

1. The population of the United States is approximately 328 million people.
2. The country has a land area of 3,794,000 square miles.
3. The national anthem of the United States is “The Star-Spangled Banner.”
4. The first president of the USA was George Washington.
5. The capital city of the United States is Washington, D.C.
6. The Great Lakes contain over 1/5 of the world's fresh water supply.
7. The Mississippi River is the longest river in North America at 2,341 miles.
8. The Grand Canyon National Park contains 277 miles of canyon walls.
9. The Statue of Liberty is a symbol of freedom and democracy.
10. The Rocky Mountains cover an area of 1.5 million square miles.