U.S. Park Police Chief Teresa Chambers said leave for some of her officers has been canceled and virtually her entire force is either working or on call, with a half-dozen events being staged on Washington' National Mall this week.

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Today, nearly half a century after Martin Luther King, Jr. led the historic March on Washington for equality, tens of thousands came to the National Mall in Washington, D.

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It was the public relations work to support the site, design, construction and dedication of the World War II Memorial on the National Mall in Washington D.

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Pledges large and small have been flooding into the official Earth Day web site since its launch in November 2010 and a rally at the National Mall in Washington D.

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The US Congress authorised the memorial in 1996, and groundbreaking is scheduled for late next year on a four-acre site among trees on the National Mall, beside Washington's Tidal Basin.

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NPR's Art Silverman went out on the National Mall here in Washington today to talk with people and sometimes jog along with them, asking if they're worried about their heart's health.

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Commencement ceremonies are held at the National Mall, within sight of the Washington Monument and the U.S. Capitol, and notable alumni include Colin Powell, Kerry Washington and Alec Baldwin.

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The monument will stand on the National Mall, the strip of parkland between the Washington Monument and the Lincoln Memorial.

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Washington duo Bluebrain released a location-aware album in the form of an app called The National Mall.

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