Prior to the Y2K USHCN adjustments, everybody (including Hansen) told us that there hadn’t been much (if any) warming in the US.
As of 1999, the 1990s were much cooler than the 1930s. People who lived through both decades accepted that assessment. Then Hansen
adjusted corrupted the temperature data, and instantaneously the downwards trend was converted into a trend of unprecedented warming – unlike anything humans had ever experienced.
But for some reason, no one living in the US noticed the catastrophic unprecedented warming – until it appeared inside Hansen’s computer. It must have been the lamest catastrophe in history. Since 1999, US temperatures have been declining.