One article reports on NIJ-sponsored research on the nature, time frames, and locations of various types of terrorist preparatory activities in relationship to the type of terrorist and where the terrorist lived prior to a planned attack in relationship to the location of the target for the attack. The first of two articles on interagency responses to large-scale emergencies draws on lessons learned from the 2005 terrorist train bombings in London, England. A third article describes NIJ's work through its International Center in developing partnerships with other countries and international bodies for the purpose of sharing research resources and findings that are mutually beneficial in addressing domestic and transnational crime. A fourth article reports on NIJ's evaluation of three software systems ("expert systems") that claim to be able to reduce the time and resources required for conducting routine single-sample DNA analysis of convicted offenders, thus making a significant impact on the backlog of such cases. The last two articles describe NIJ's efforts to assist law enforcement agencies in developing organization and strategies for investigating cold cases, i.e., cases for which results from probative evidence have been exhausted without the case having been solved.