NASA and the U.S. Department of the Interior through the U.S. Geological Survey (USGS) jointly manage Landsat. The USGS preserves the archive of Landsat images and distributes all of the 40-years of Landsat data free over the Internet.
Source: NASA Goddard Mutlimedia
+ Download video: Rebuilding Poplar Island
+ “Escapes: Rebuilding Maryland’s wild islands” The Washington Post [external link]