Michael Hammer has found the original uncorrupted GISS US temperature data on John Daly’s web site. Prior to GISS/USHCN perverting the data set in the year 2000, the 1930s was the hottest decade.
The data was originally here : http://www.giss.nasa.gov/data/update/gistemp/graphs/FigD.txt
If you try to go to that page, you get this :
The requested URL /gistemp/graphs_v3/FigD.txt was not found on this server
So I went to the web archive, to look for an archived copy of the data on the GISS web site.
This is what you get there :
Here is what www.giss.nasa.gov robots.txt looks like. Hansen is blocking the web archive from searching GISS data, selected meetings and his publications.