## References
- [USA.gov](https://www.usa.gov/) — official U.S. government portal - [The White House](https://www.whitehouse.gov/) - [U.S. Census Bureau](https://www.census.gov/) - [U.S. Department of Education](https://www.ed.gov/) - [National Center for Education Statistics](https://nces.ed.gov/) - [Bureau of Labor Statistics](https://www.bls.gov/) - [Bureau of Economic Analysis](https://www.bea.gov/) - [Federal Emergency Management Agency (FEMA)](https://www.fema.gov/) - [Centers for Disease Control and Prevention](https://www.cdc.gov/) - [Environmental Protection Agency](https://www.epa.gov/) - [AirNow](https://www.airnow.gov/) - [National Park Service](https://www.nps.gov/) - [NOAA](https://www.noaa.gov/) - [National Weather Service](https://www.weather.gov/) - [U.S. Energy Information Administration](https://www.eia.gov/) - [Federal Communications Commission](https://www.fcc.gov/) - [Library of Congress](https://www.loc.gov/) - [U.S. Chamber of Commerce](https://www.uschamber.com/) - [United States on Wikipedia](https://en.wikipedia.org/wiki/United_States) - [World Bank country data](https://data.worldbank.org/country/united-states) - [OECD country profile](https://www.oecd.org/unitedstates/) - [Pew Research Center](https://www.pewresearch.org/) - [Encyclopaedia Britannica: United States](https://www.britannica.com/place/United-States)