WASHINGTON D.C. - Coast Guard Commandant Adm. Bob Papp, Chief of Naval Operations Adm. Gary Roughead, Under Secretary of Commerce for Oceans and Atmosphere and NOAA Administrator Dr. Jane Lubchenco and Chief Scientist at the National Ice Center Pablo Clemente Colon attend the 4th Symposium on the Impacts of an Ice-Diminishing Arctic on Naval and Maritime Operations at the Navy Memorial June 20, 2011. Papp and Lubchenco took questions from the media during a press conference as part of the event. U.S. Coast Guard photo by Petty Officer 2nd Class Patrick Kelley.