We reviewed the department's approach to information sharing with state and local fusion centers. Our objectives were to determine (1) the effectiveness of DHS' strategy, processes, and activities for facilitating information sharing with fusion centers; and (2) the extent to which information technology systems support information sharing between the department and these centers. DHS has made progress in its efforts to improve information sharing with fusion centers. Fusion center personnel indicated that information sharing had improved over time and the information received from the department met their needs primarily due to the deployment of DHS intelligence officers to the centers. As a result of improved information sharing, fusion centers have successfully collaborated with the department during numerous large-scale events and maintained situational awareness after attempted terrorist attacks or other incidents. However, DHS component collaboration in the information sharing process needs improvement, and some intelligence products could better meet state and local needs. In addition, information technology systems do not fully support information sharing between DHS and state and local fusion centers. Specifically, fusion center personnel make limited use of information sharing systems and instead rely on emails for situational awareness and intelligence sharing. Personnel from fusion centers identified challenges with limited system content and usability, as well as the existence of too many federal systems and no ability to conduct comprehensive or simultaneous searches across multiple systems or department databases.