Climate scientist Michael Mann applauds as he listens to former President Bill Clinton during a rally for Democratic gubanatorial candidate Terry McAuliffe, in Charlottesville, Va., Wednesday, Oct. 30, 2013. Mann is the former University of Virginia professor who was sued by Virginia Attorney General Ken Cuccinelli. Cuccinelli, a climate change skeptic, is seeking the documents for an investigation into whether Mann defrauded taxpayers by using manipulated data to obtain government grants. (AP Photo/Steve Helber)