|Hansen breaking the law in "defense of the planet".
It seems that he breaks rules of scientific integrity as well.
Real Science gives NASA climate "scientist" a colonoscopy; they compare his predictions to reality, and examine his manipulation of data. Please read the whole thing. The animated image (about 20% down the page) is particularly damning.
For the past 30 years, NASA climate scientists under the leadership of Dr. Hansen have demonstrated nearly complete incompetence in forecasting, and they have tampered with data to try to hide their mispredictions.