Washington, DC in the context of "AAA Foundation for Traffic Safety"

Texas declared its secession from the Union on February 1, 1861, and joined the Confederate States on March 2, 1861, after it had replaced its governor, Sam Houston, who had refused to take an oath of allegiance to the Confederacy. As with those of other states, the Declaration of Secession was not recognized by the US government at Washington, DC. Some Texan military units fought in the Civil War east of the Mississippi River, but Texas was more useful for supplying soldiers and horses for the Confederate Army. Texas' supply role lasted until mid-1863, when Union gunboats started to control the Mississippi River, which prevented large transfers of men, horses, or cattle. Some cotton was sold in Mexico, but most of the crop became useless because of the Union's naval blockade of Galveston, Houston, and other ports.

The Council on Foreign Relations (CFR) is an American think tank focused on U.S. foreign policy and international relations. Founded in 1921, it is an independent and nonpartisan 501(c)(3) nonprofit organization with longstanding ties to political, corporate, and media elites. CFR is based in New York City, with an additional office in Washington, D.C. Its membership has included senior politicians, secretaries of state, CIA directors, bankers, lawyers, professors, corporate directors, CEOs, and prominent media figures.

CFR meetings convene government officials, global business leaders, and prominent members of the intelligence and foreign-policy communities to discuss international issues. CFR publishes the bi-monthly journal Foreign Affairs since 1922. It also runs the David Rockefeller Studies Program, which makes recommendations to presidential administrations and the diplomatic community, testifies before Congress, interacts with the media, and publishes research on foreign policy issues.

The African-American middle class refers to those within the African-American community who have achieved middle-class status in the U.S. class structure. It is a societal level within the African-American community that primarily began to develop in the early 1960s, when the ongoing Civil Rights Movement led to the outlawing of de jure racial segregation. The African American middle class exists throughout the United States, particularly in the Northeast and in the South, with the largest contiguous majority black middle-class neighborhoods being in the Washington, DC suburbs in Maryland. The African American middle class is also prevalent in the Atlanta, Charlotte, Houston, Memphis, Dallas, Los Angeles, New Orleans, New York, San Antonio, and Chicago areas. The black middle class has experienced significant growth since the 1960s, accompanied by a decrease in the percentage of impoverished blacks. In the early 1960s, approximately 9 to 12 percent of blacks were considered middle class, whereas over half of the black population was categorized as poor. By the conclusion of the 20th century, around one-third of blacks were identified as middle class, with about 25 percent still classified as poor. In comparison, more than two-thirds of whites belong to the middle class, and less than 10 percent are classified as poor. Therefore, although the class structure of African American in the post-civil rights era bears some resemblance to that of whites, it is only a partial reflection, as the white middle class is at least double the size of the black middle class, and the proportion of African American living in poverty is twice that of white people.

The Okinawa Reversion Agreement (Japanese: 沖縄返還協定, Hepburn: Okinawa henkan kyōtei) is an agreement between the United States and Japan in which the US agreed to relinquish in favor of Japan all rights and interests under Article III of the Treaty of San Francisco, which had been obtained as a result of the Pacific War, and thus return Okinawa Prefecture to Japanese sovereignty. The document was signed simultaneously in Washington, DC, and Tokyo on June 17, 1971, by William P. Rogers on behalf of US President Richard Nixon and Kiichi Aichi on behalf of Japanese Prime Minister Eisaku Satō. The document was not ratified in Japan until November 24, 1971, by the National Diet.

The Peace and Justice Studies Association (PJSA) is a non-profit organization headquartered at Georgetown University in Washington, DC.

It was created following increased interest in peace-building after the September 11th attacks in USA, and it organizes annual conferences, publishes papers and a magazine, and issues awards for peace-builders.

The American Astronomical Society (AAS, sometimes spoken as "double-A-S") is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC. The primary objective of the AAS is to promote the advancement of astronomy and closely related branches of science, while the secondary purpose includes enhancing astronomy education and providing a political voice for its members through lobbying and grassroots activities. Its current mission is to enhance and share humanity's scientific understanding of the universe as a diverse and inclusive astronomical community.

Mike Monroney Aeronautical Center is a regional office of the United States Federal Aviation Administration (FAA) on the grounds of Will Rogers Airport in Oklahoma City. With around 7,500 direct federal employees, the Aeronautical Center is one of the Department of Transportation's largest facilities outside the Washington, DC area, and one of the 10 largest employers in the Oklahoma City metropolitan area. It is named for Senator Mike Monroney of Oklahoma, who wrote and sponsored the Federal Aviation Act of 1958.

Arlington Boulevard is a major arterial road in Arlington County, Fairfax County, and the independent City of Fairfax in Northern Virginia in metropolitan Washington, DC, United States. It is designated U.S. Route 50 (US 50) for its entire length and is part of the National Highway System.

Arlington Boulevard serves to bisect Arlington County into its northern and southern sections in popular parlance and for designation of street directional affixes according to the county's street-naming system.