running programs, or advocating on behalf of people. Many of these organizations are headquartered or have major offices in the city. Among these organizations are the UN Foundation, Human Rights Campaign, Amnesty International, and the National Endowment for Democracy. The city is also the country's primary location for international development firms, many of whom find funding by contracting with the United States Agency for International Development (USAID), which is the U.S. federal government's aid agency and is located in the city. The American Red Cross, a humanitarian agency focused on emergency relief, is headquartered in the city. Private sector According to statistics compiled in 2011, four of the largest 500 companies in the country were headquartered in Washington, D.C. In the 2021 Global Financial Centres Index, Washington was ranked as having the 14th most competitive financial center in the world, and fourth most competitive in the United States (after New York City, San Francisco, and Los Angeles). Among the largest companies headquartered in Washington, D.C. are Fannie Mae, Amtrak, Lockheed Martin, Marriot International, Danaher Corporation, FTI Consulting, and Hogan Lovells. Due to the building height restrictions in Washington, D.C., taller buildings are able to be built in suburban Maryland and Virginia. Capital One Bank, which is one of the largest banks in the country, is headquartered in nearby Tysons, Virginia, a large and growing financial center located in Fairfax County. The headquarter building for Capital One Bank, known as Capital One Tower, is the tallest occupied building in the Washington region. In 2018, Amazon announced it would build a second headquarters building, known as HQ2", in the Crystal City neighborhood of Arlington County, Virginia, which is located just across the Potomac River from Washington, D.C. In addition to Capital One, some of the largest companies headquartered in Northern Virginia include Hilton, Navy Federal Credit Union, Mars, Freddie Mac, Northrop Grumman, and General Dynamics. The Washington, D.C. economy also benefits from being home to many prominent news and media organizations. Among these are The Washington Post, The Washington Times, Politico, and The Hill. There are also many television and radio media organizations either headquartered in or near the city or with large offices in the region, such as CNN, PBS, C-SPAN, CBS, NBC, Discovery, and NPR, among others. The Gannett Company is a mass media holding company headquartered in Tysons, Virginia which owns numerous national and local newspapers that publish across