DHS's seven operational components, listed along the bottom of figure 1, lead the department's frontline activities. As described in DHS's Quadrennial Homeland Security Review Report, the department has five core missions: (1) preventing terrorism and enhancing security, (2) securing and managing our borders, (3) enforcing and administering our immigration laws, (4) safeguarding and securing cyberspace, and (5) ensuring resilience to disasters. 10Federal Financial Accounting Standards No. 4, Managerial Cost Accounting Standards and Concepts, July 31, 1995. In addition to the five missions, DHS focuses on two areas: (1) providing essential support to national and economic security, such as maximizing the collection of customs revenue, and (2) maturing and strengthening DHS, such as enhancing shared awareness of risks and threats.