Daniel Yergin, co-founder and chairman of Cambridge Energy Research Associates, listens to a question during the Reuters Energy Summit in Washington June 1, 2009. View Photo »
Daniel Yergin, co-founder and chairman of Cambridge Energy Research Associates, responds to a question during the Reuters Energy Summit in Washington June 1, 2009. View Photo »
Daniel Yergin, co-founder and chairman of Cambridge Energy Research Associates, addresses the Reuters Energy Summit in Washington June 1, 2009. View Photo »
