(July 2008, 52 pages, 4.52 MB). This working paper resulted from research funded by the U.S. National Intelligence Council as an input to a National Intelligence Assessment on climate change implications for U.S. National Security, produced May 2008. The research developed quantitative indicators of aggregate vulnerability to climate change, exposure to potential sea-level rise, and water scarcity. The work was done in collaboration with Charles Vörösmarty of the University of New Hampshire (now at City College New York) and Thomas Parris of ISciences.