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District of Columbia
Washington, D.C., was formed by the 1871 merger of the city of Washington and the territory of Columbia; it is legally referred to as the District of Columbia, but is more commonly called Washington or D.C. The capital of the United States, the city has grown as the federal government has, accommodating the lobbyists, lawyers, trade unions, professional associations, nonprofit organizations, contractors, and other private-sector organizations that need to be proximate to the seat of power, as well as the service sector that supports the city. Although D.C. is an industry town in much the same way as Hollywood, just like Hollywood it has a more diversified economy than people commonly believe: George Washington University, Georgetown University, the Washington Hospital Center, Howard University, and Fannie Mae are the five largest nongovernment-related employers in the city, which is also home to five Fortune 1000 companies. After New York City and Chicago, D.C. has the largest amount of commercial office space in its downtown area. The diversified but quirky economy indicates a quirky and diverse population: D.C. has a weekend population of about 600,000, which nearly doubles during the workweek thanks to commuters from suburbs in Virginia and Maryland. D.C. is predominantly African American (about 56 percent), and about 12 percent of the population is made up of foreign immigrants, especially from El Salvador, Vietnam, and Ethiopia.
The who's who of Washington, D.C., gather for the second inauguration of President George W. Bush in January 2005.

The significance of the African American communities in D.C. is often overlooked by outsiders, who underestimate the strength of local kinship and ethnic social networks. Unlike other significantly sized cities with predominantly black populations, D.C. has always had a large black population, dating to the freeing of a large number of slaves after the Revolutionary War. The free black population in D.C. grew steadily over the 19th century and remained steady after the Civil War; it has in fact been declining since the 1970s, when it peaked at 70 percent. Since then, D.C.'s established black middle class has been gradually relocating to the suburbs.
Political Networks in the Nation's Capitol
There are many social networks in the city revolving around the business of politics and the many subsidiary activities that surround the government, from lobbying to education to the military to the expatriate community of diplomats and their families and staff. Much of this is true to some degree or another in many other large cities, but unique to the D.C. metropolitan area is the vast concentration of the U.S. intelligence community (IC). Formally speaking, the IC consists of 16 federal agencies that deal with intelligence, foreign relations, and national security and is overseen by the director of national intelligence. Informally, this community includes not only the employees of intelligence agencies—most of whom are not “spies” in the popular sense but support staff, analysts, administrators, researchers, scientists, and so on—but also the civilians affiliated in some way (which may include contractors and assets) and the intelligence agencies of other countries and international bodies. An information-sharing agreement between the American, British, Canadian, Australian, and New Zealand intelligence agencies has been in effect since 1941, for instance.
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- History of Social Networking
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