Final answer:
The response to 9/11 and subsequent terror attacks created a new debate about the balance between civil liberties and public safety.
Step-by-step explanation:
The event that created a new debate about the balance between civil liberties and public safety was the response to 9/11 and subsequent terror attacks. Following these events, there was an increased focus on national security measures, including the passage of the USA PATRIOT Act, which raised concerns about the potential infringement on civil liberties in the name of public safety.
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