Information sharing among federal, state, and local officials is crucial for preventing acts of terrorism on U.S. soil. The Department of Homeland Security (DHS), through its Office of Intelligence and Analysis (I&A), has lead federal responsibility for such information sharing. GAO was asked to assess (1) actions I&A has taken to enhance the usefulness of intelligence products it provides to state and local partners, (2) other services I&A provides to these partners, and (3) to what extent I&A has defined how it intends to share information with these partners. To conduct this work, GAO reviewed relevant statutes, strategies, best practices, and agency documents; contacted a nongeneralizable sample of 10 fusion centers, where states collaborate with federal agencies to improve information sharing, based on geographic location and other factors; and interviewed I&A officials. This is a public version of a sensitive report that GAO issued in September 2010. Information DHS deemed sensitive has been redacted. GAO recommends that I&A establish milestones for identifying the information needs of state and local partners, report to these partners on how I&A used feedback they provided to enhance intelligence products, identify and document priority programs and activities related to its state and local mission, and establish time frames for developing additional related performance measures. DHS agreed with these recommendations.