Earth Resources Observation and Science (EROS) Center
The link you are trying to use is incorrect.
The updated link is http://eros.usgs.gov/#/Find_Data/Products_and_Data_Available/Tri-Decadal_Global_Landsat_Orthorectified_Overview.
U.S. Department of the Interior
U.S. Geological Survey
Page Contact Information:
custserv@usgs.gov