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    The United States of America is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait, and the state of Hawaii is in the mid-Pacific. The United States also possesses several territories, or insular areas, scattered around the Caribbean and Pacific.


    At 3.79 million square miles (9.83 million km²) and with over 300 million people, the United States is the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world's most ethnically diverse nations, the product of large-scale immigration from many countries. The U.S. economy is the largest national economy in the world, with a nominal 2006 gross domestic product (GDP) of more than US$13 trillion (over 19% of the world total based on purchasing power parity).

    The nation was founded by     thirteen colonies of Great Britain located along the Atlantic seaboard. Proclaiming themselves "states," they issued the Declaration of Independence on July 4, 1776. The rebellious states defeated Great Britain in the American Revolutionary War, the first successful colonial war of independence. A federal convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic. The Bill of Rights, comprising ten constitutional amendments, was ratified in 1791.

    In the nineteenth century, the United States acquired land from France, Spain, Great Britain, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. Disputes between the agrarian South and industrial North over states' rights and the expansion of the institution of slavery provoked the American Civil War of the 1860s. The North's victory prevented a permanent split of the country and led to the end of slavery in the United States. The Spanish-American War and World War I confirmed the nation's status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons, a permanent member of the United Nations Security Council, and a founding member of NATO. In the post–Cold War era, the United States is the only remaining superpower—accounting for approximately 50% of global military spending—and a dominant economic, political, and cultural force in the world.

  1. USA

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    1. Mentioned In 12 Articles

    2. Arketi Group Earns 10 Public Relations Society of America Awards

      Explore Atlanta business news (Nov 15 2010)

      ...utreach and events, Arketi secured 74 stories, reaching nearly 16 million through outlets including USA Today, MSN Money, and BusinessWeek.com. * Business to Business for Arketi's campaign to position Th... (Read Full Article)

      Comment Mentions:   Michigan   Social Media   Phoenix

    3. Brain Monitor Eliminates Need for Routine Oxygen With Propofol ...

      Explore Printdayly (Jul 3 2010)

      ...orum.com has a forum page for every school, public and private in the country. Every teacher in the USA can now log on to their schools forum page by selecting their state, city, and school then choosing... (Read Full Article)

      Comment Mentions:   Washington   Chicago   California

    4. Clear Acne Now: Now Available Online

      Explore http://kumqyrxhznvz.com/ (Jun 16 2010)

      ...l Business Manager responsible for developing Thomas Skid Steer Loader business in the Southeastern USA as well as in South America and Central America. Auer, who is fluent in Spanish and English, has ne... (Read Full Article)

      Comment Mentions:   Japan   Florida   Spanish

    5. New Website Helps Schools and Teachers Keep Parents Informed

      Explore A comprehensive website (Jun 13 2010)

      ...orum.com has a forum page for every school, public and private in the country. Every teacher in the USA can now log on to their schools forum page by selecting their state, city, and school then choosing... (Read Full Article)

      Comment Mentions:   Paris   Amsterdam   Thought Leader

    6. Brain Monitor Eliminates Need for Routine Oxygen With Propofol ...

      Explore A comprehensive website (May 26 2010)

      ...orum.com has a forum page for every school, public and private in the country. Every teacher in the USA can now log on to their schools forum page by selecting their state, city, and school then choosing... (Read Full Article)

      Comment Mentions:   Washington   Chicago   California

    7. Brain Monitor Eliminates Need for Routine Oxygen With Propofol ...

      Explore ask for tax (May 24 2010)

      ...orum.com has a forum page for every school, public and private in the country. Every teacher in the USA can now log on to their schools forum page by selecting their state, city, and school then choosing... (Read Full Article)

      Comment Mentions:   Washington   Chicago   California

    8. Brain Monitor Eliminates Need for Routine Oxygen With Propofol ...

      Explore Automoved (May 21 2010)

      ...orum.com has a forum page for every school, public and private in the country. Every teacher in the USA can now log on to their schools forum page by selecting their state, city, and school then choosing... (Read Full Article)

      Comment Mentions:   Washington   Chicago   California

    9. mar.kit.in: Why is online marketing specifically SEO more popular ...

      Explore mar.kit.in (May 20 2010)

      ...he travel sites are both. Right now 14% of all retail sales are done on line and are growing in the USA. This is much higher in countries such as Australia and other GSM mobile phone platforms. Searching... (Read Full Article)

      Comment Mentions:   Google   India   Australia

    10. Paula Abdul Leads the Way among Celebrity Twitterers: Outdoes ...

      Explore ask for tax (May 4 2010)

      ...orum.com has a forum page for every school, public and private in the country. Every teacher in the USA can now log on to their schools forum page by selecting their state, city, and school then choosing... (Read Full Article)

      Comment Mentions:   Washington   Chicago   California

    11. Thought Leadership: Thinking, listening and articulating « Andy ...

      Explore Andy Winter's BHT Blog (Feb 1 2010)

      ... least in part. Over the weekend I was reading something by Craig Pearce, a PR practitioner in the USA, who said that there are two aspects for those doing Thought Leadership: they need to engage in two... (Read Full Article)

      Comment Mentions:   Thought Leader   USA   Craig Pearce

    12. Can You Innovate In Marketing? - Chuck's Blog

      Explore Chuck's Blog (Jan 20 2010)

      Can You Innovate In Marketing? - Chuck's Blog ... world and into mainstream media -- we had more than a few press mentions in publications like USA Today and the like. Key point: really interesting ideas transcend your category. And then there's t... (Read Full Article)

      Comment Mentions:   Cisco   Healthcare   Social Media

    13. Social Media Content Marketing Advantage -Yinka Olaito - m2weekly.com

      Explore m2weekly.com (Oct 8 2009)

      ...cation of the new media. # Yinka Olaito is a member of Social Media Club International, California, USA and Nigeria’s chapter President. Connect with him on yinka@yinkaolaito.com or Tel: 23... (Read Full Article)

      Comment Mentions:   California   Richard Branson   Social Media

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