Landsat 40 Briefing (201207230002HQ)

Anne Castle, assistant secretary for water and science, U.S.

Department of the Interior, speaks during a news conference between NASA and the U.S. Geological Survey (USGS) to highlight the accomplishments of the world's longest-running Earth-observing satellite program, Landsat, at the Newseum, Monday, July 23, 2012, in Washington. In cooperation with the U.S. Department of the Interior (DOI) and its science agency, USGS, NASA launched the first Landsat satellite July 23, 1972. The resulting 40-year archive of Earth observations from the Landsat fleet forms an impartial, comprehensive, and easily accessed register of human and natural changes on the land. Photo Credit: (NASA/Paul E. Alers)

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Taken on July 23, 2012