Jaczko, Gregory B.: - Dr. Gregory Jaczko served as Chairman of the US Nuclear Regulatory Commission from 2009-2012, and as a commissioner from 2005-2009. As Chairman, he played a lead role in the American government's response to the Fukushima nuclear accident in Japan. Jaczko is now an adjunct professor at Princeton University and Georgetown University, and an entrepreneur with a clean energy development company. He is the author of Confessions of a Rogue Nuclear Regulator.