National security can significantly impact civil liberties, often leading to the suspension or limitation of rights in the name of protecting citizens. For instance, during crises, governments may impose surveillance, curtail free speech, or restrict assembly to safeguard against threats. Such actions raise important questions about the balance between ensuring safety and upholding individual rights. Historical instances, like the Patriot Act post-9/11, illustrate how national security concerns can lead to long-term changes in legal frameworks. Ongoing debates increasingly scrutinize whether security measures excessively infringe upon fundamental civil liberties.