The oceanographer of the Navy and director of the U.S. Navy's Task Force Climate Change discussed the national security implications of the changing global climate at the United Nations climate change summit in Copenhagen Dec. 16. Formally known as the United Nations Framework Convention on Climate Change (UNFCCC) Conference of Parties 15 (COP-15), the summit, according to a statement on the convention's website, brings together negotiators, ministers, and world leaders as part of a unified international effort to combat climate change. "The U.S.