I was awarded the Presidential Early Career Award for Scientists and Engineers by President Bush in a ceremony at the White House on December 19, 2008. The award was for my work on computer models of human behavior in critical situations. Press releases: White House; Executive Office of the President, Office of Science and Technology Policy; National Science Foundation; Arizona State University; The Association of American Geographers; UCL Centre for Advanced Spatial Analysis (CASA); UCL Department of Geography; Engineering News Record; The Irish Times. (Photo by Chris Greenberg.)