This is a review of governmentwide changes and challenges prevalent in the missions and activities of agencies involved in homeland security, including the coordination and collaboration required to meet overall goals and needs, and government's efforts in planning and implementing strategic, transitional, and human capital activities designed to reorganize and strengthen homeland security. The federal government's response on homeland security issues is still evolving. The federal government's efforts to improve homeland security will require a results-oriented approach to ensure mission accountability and sustainability over time. Charts and tables.