.Fifteen years ago, government scientists were unhappy that the US was cooling and wrecking their theory, so they simply altered the data in a series of steps – to turn cooling into warming.

in the U.S. there has been little temperature change in the past 50 years, the time of rapidly increasing greenhouse gases — in fact, there was a slight cooling throughout much of the country

our analysis (Hansen et al., 1999a), …. makes clear that climate trends have been fundamentally different in the U.S. than in the world as a whole

NASA GISS: Science Briefs: Whither U.S. Climate?

ftp://ftp.ncdc.noaa.gov/pub/data/ushcn/v2.5/ushcn.tavg.latest.FLs.52i.tar.gz
ftp://ftp.ncdc.noaa.gov/pub/data/ushcn/v2.5/ushcn.tavg.latest.tob.tar.gz
ftp://ftp.ncdc.noaa.gov/pub/data/ushcn/v2.5/ushcn.tavg.latest.raw.tar.gz