This is a very complex question and the answer truly depends on the person answering the question. In my opinion, the threat of war does not justify unlimited limits on civil liberties. In cases of threat of war, some countries will take extreme actions like limiting their people's access to the news or internet. This is an extreme measure of taking away certain civil liberties. However they may be situations where a government may prevent their people from visiting a country that has made a proven threat of danger to its people or country. To me this is not a violation of civil liberties, it is the government working to clearly protect their people from direct harm.
