Adm. Paul Zukunft, the commandant of the U.S. Coast Guard, discusses modernization programs, missions and the implications of climate change with Defense & Aerospace Report Editor Vago Muradian. Zukunft was among the naval and coast guard leaders from more than 100 nations to attend the 22nd International Seapower Symposium Sept. 21-23 at the US Naval War College in Newport, R.I.