A group image made at the Leading by Example: How Energy Innovation is Strengthening America’s Military, an energy security briefing hosted by the Pew Clean Energy Program on July 7, 2011 in Washington, D.C.  From left to right, The Honorable Terry A. Yonkers, Assistant Secretary of the Air Force (Installations, Environment and Logistics), The Honorable Katherine Hammack, Assistant Secretary of the Army (Installations and Environment), The Honorable Jackalyne Pfannenstiel, Assistant Secretary of the Navy (Energy, Installations and Environment), The Honorable John W. Warner, Former U.S. Senator and Armed Services Committee Chairman, senior adviser to the Pew Project on National Security, Energy and Climate, Phyllis Cuttino, Director of Pew’s Clean Energy Program, and Admiral John Nathman.