Source: USGS Landsat Mission
Aug. 24, 2012 • A large metadata and file name update will be released on August 29, 2012. All access to Landsat data will be down for the day, with a return on August 30th. You can still view full resolution images through the LandsatLook Viewer.
The world has lost 561 square miles (1,453 square kilometers) of salt marshes over the past 20 years.