Final answer:
The Department of Homeland Security, created after 9/11, focuses on terrorism and security threats, with natural disaster response like hurricanes and earthquakes not being a primary mission.
Step-by-step explanation:
Following the September 11 attacks, President George W. Bush established the Department of Homeland Security which did not focus on Hurricanes and earthquakes as a primary mission. This new department centralized various security functions across the government to ensure better control and response to threats. Despite its creation, FEMA's response to Hurricane Katrina highlighted continued challenges in interagency coordination, not a core focus for the new department, which was more oriented towards preventing terrorist attacks and improving national security infrastructure.
The Department of Homeland Security was given mandates to oversee initiatives related to border and transportation security, protection against chemical, biological, radiological, and nuclear attacks, and information analysis and infrastructure protection. These areas directly address threats of terrorism and safeguarding critical infrastructure rather than natural disaster management, which is a secondary aspect of the broader mission set of the DHS. Consequently, the functions and successes of the department are more aligned with the Bush administration's focus on preemptive measures against terrorism and strengthening federal power in times of national security crises.