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The United States is a leader in the development of artificial intelligence technology and has maintained a space program since the late 1950s, with plans for long-term habitation of the Moon. [305] [306] In 2022, the United States was the country with the second-highest number of published scientific papers. [307]
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Learn about the United States, including American history, the president, holidays, the American flag, census data, and more. A-Z index of U.S. government departments and agencies Get contact information for U.S. federal government agencies, departments, instrumentalities, and government-sponsored enterprises.
The United States is a country in North America that is a federal republic of 50 states. Besides the 48 conterminous states that occupy the middle latitudes of the continent, the United States includes the state of Alaska, at the northwestern extreme of North America, and the island state of Hawaii, in the mid-Pacific Ocean.
4 days ago · United States is a vast and diverse country in North America, with a rich history, a global influence, and a variety of natural and cultural attractions. Learn more about its geography, flag, population, and major cities, such as the capital Washington, D.C., where you can explore the monuments and museums that showcase the nation's heritage.
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