Arlington County, Virginia in the context of "September 11 attacks"

The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the U.S. military, the phrase The Pentagon is often used as a metonym for the Department of Defense and its leadership.

The building was designed by American architect George Bergstrom and built by contractor John McShain. Ground was broken on 11 September 1941, and the building was dedicated on 15 January 1943. General Brehon Somervell provided the major impetus to gain Congressional approval for the project. Colonel Leslie Groves was responsible for overseeing the project for the U.S. Army Corps of Engineers, which supervised it.

The United States Department of Defense (DoD), also referred to as the Department of War (DoW), is an executive department of the U.S. federal government charged with coordinating and supervising the U.S. Armed Forces—the Army, Navy, Marines, Air Force, Space Force, and, for some purposes, the Coast Guard—and related functions and agencies. Headquartered at the Pentagon in Arlington County, Virginia, just outside Washington, D.C., the stated mission of the Department of Defense is "to provide the military forces needed to deter war and ensure our nation's security".

The Department of Defense is headed by the secretary of defense, a cabinet-level head who reports directly to the president of the United States. The president is commander-in-chief of the U.S. armed forces. Beneath the Department of Defense are three subordinate military departments: the Department of the Army, the Department of the Navy, and the Department of the Air Force. In addition, four national intelligence services are subordinate to the Department of Defense: the Defense Intelligence Agency, National Security Agency (NSA), National Geospatial-Intelligence Agency, and National Reconnaissance Office.

George Edwin Bergstrom (March 12, 1876 – June 17, 1955) was an American architect who designed many buildings in Los Angeles, California. He also designed The Pentagon in Arlington County, Virginia.

Nonviolent resistance, or nonviolent action, sometimes called civil resistance, is the practice of achieving goals such as social change through symbolic protests, civil disobedience, economic or political noncooperation, satyagraha, constructive program, or other methods, while refraining from violence and the threat of violence. This type of action highlights the desires of an individual or group that feels that something needs to change to improve the current condition of the resisting person or group.

Mahatma Gandhi is the most popular figure related to this type of protest; United Nations celebrates Gandhi's birthday, October 2, as the International Day of Non-Violence. Other prominent advocates include Abdul Ghaffar Khan, Henry David Thoreau, Etienne de la Boétie, Charles Stewart Parnell, Te Whiti o Rongomai, Tohu Kākahi, Leo Tolstoy, Alice Paul, Martin Luther King Jr., Daniel Berrigan, Philip Berrigan, James Bevel, Václav Havel, Andrei Sakharov, Lech Wałęsa, Gene Sharp, Nelson Mandela, Jose Rizal, and many others. From 1966 to 1999, nonviolent civic resistance played a critical role in fifty of sixty-seven transitions from authoritarianism.

Arlington National Cemetery is the largest cemetery in the United States National Cemetery System, one of two maintained by the United States Army. More than 400,000 people are buried in its 639 acres (259 ha) in Arlington County, Virginia.

Arlington National Cemetery was established on 13 May 1864, during the American Civil War after Arlington Estate, the land on which the cemetery was built, was confiscated by the U.S. federal government from the private ownership of Confederate States Army general Robert E. Lee's family following a tax dispute over the property. The cemetery is managed by the U.S. Department of the Army. As of 2024, it conducts approximately 27 to 30 funerals each weekday and between six and eight services on Saturday, or 141 to 158 per week.

The National Rural Electric Cooperative Association (NRECA) represents the interests of over 900 electric cooperatives in the United States. Cooperatives are not-for-profit and are owned by their membership. Founded in 1942, NRECA unites the country's generation, transmission, and distribution cooperatives found in 47 states, serving over 40 million people. It is headquartered in Arlington, Virginia, and since 2016 its CEO has been former U.S. Congressman Jim Matheson.

Electric cooperatives serve 12 percent of the nation's population, yet own 42 percent of America's distribution lines covering three-quarters of the country. Currently, over 90% of electric cooperatives include renewable generation in their portfolios, receiving 11 percent of their total power from renewable sources compared to 8 percent for the entire utility sector.

Ballston Quarter is one of the first major suburban shopping centers built in the Washington metropolitan area. It opened in 1951 as Parkington Shopping Center and was the nation's first shopping center built around a multi-story parking garage. It is located at the intersection of Glebe Road and Wilson Boulevard in the Ballston neighborhood of Arlington County, Virginia, two blocks from Ballston–MU station on the Washington Metro's Orange and Silver lines. It was remodeled as Ballston Common Mall in 1986 and again in 2019 as Ballston Quarter.

An edge city is a concentration of business, shopping, and entertainment outside a traditional downtown or central business district, in what had previously been a suburban, residential or rural area. The term was popularized by the 1991 book Edge City: Life on the New Frontier by Joel Garreau, who established its current meaning while working as a reporter for The Washington Post. Garreau argues that the edge city has become the standard form of urban growth worldwide, representing a 20th-century urban form unlike that of the 19th-century central downtown. Other terms for these areas include suburban activity centers, megacenters, and suburban business districts. These districts have now developed in many countries.