Final answer:
President George W. Bush's belief in the interdependence of freedom and liberty within the United States and across the world is supported by his response to the 9/11 attacks and his establishment of the Office of Homeland Security and the passage of related acts.
Step-by-step explanation:
In the given excerpt, President George W. Bush's belief in the interdependence of freedom and liberty within the United States and across the world can be supported by his response to the 9/11 attacks and his foreign policy directive known as the Bush Doctrine. Following the attacks, Bush believed that proactive steps were necessary to counter credible threats to America's security, leading to the establishment of the Office of Homeland Security and the passage of the Homeland Security Act and USA Patriot Act.