Government requests to suspend civil liberties are always rationalized by "crisis." In the aftermath of the terrorist attacks of Sep 11, 2001, not only legal scholars but all Americans wondered what the civil liberties fallout would be. A particular area of concern was, and still is, the First Amendment protections, especially of speech and press.
The First Amendment in a Time That Tries Men’s Souls,
65 Law and Contemporary Problems
Available at: https://scholarship.law.duke.edu/lcp/vol65/iss2/4