Final answer:
The terrorist attacks of September 11, 2001, impacted the flow of information in the United States by enhancing national security measures and restricting information dissemination.
Step-by-step explanation:
The terrorist attacks on September 11, 2001, had a significant impact on the flow of information in the United States. One of the key effects was the enhanced national security measures that were implemented. The creation of the Department of Homeland Security and the passing of laws like the Patriot Act allowed the government to collect and share more information in the name of protecting the country.
However, these measures also resulted in restricted information dissemination. Government surveillance increased, and there was a push for more control over classified information. The media also faced challenges in reporting certain topics due to concerns about national security.
Overall, while the attacks led to increased government transparency in some areas, such as disaster response, they also brought about a greater emphasis on national security and restricted the free flow of information.