Flashback 1989: NASA’s James Hansen – Busted! ‘In 1989, the experts concluded that the US was not warming. Hansen’s 1999 graph agreed…Phil Jones also agreed that the US was not warming’
'No warming means no funding and no massive ego trip, so Hansen fixed the temperature record in the year 2000 to produce a lot of US warming prior to 1989. See animation of how 'Hansen rewrote US history'