NOAA is determined to make 2012 the hottest year ever, no matter how much cheating is required.
Thermometers show that 2012 is the third warmest year in US history, after 1934 and 1921. But that story just isn’t going to scare anyone into forking over their hard earned money, so NOAA has massively cooled the past and warmed the present.
USHCN literature claims that adjustments go flat after 1990, but their actual adjustments increase exponentially. They are adding on an additional 0.6 degrees since 1990, which has no justification, and is plain and simple fraud. The total adjustment since the early 20th century is almost two degrees.