When the 9/11 attacks occurred on American soil, the government had to respond in a certain manner to ensure the safety of its people. Based off of an argument brought up by Cory Doctorow in his novel Little Brother, I agree that the government first has to protect the safety of all citizens above anything else. Therefore, the government's action to look into previous phone calls and other similar information I believe is justified. While I also advocate for privacy rights, technology has such an affect on globalization that the government would not be able to ensure these terrorists were brought to justice if they did not search through these messages.
However, my concern is: when does this investigation stop? The government can be justified for looking to catch the terrorists and their accomplices, but how do we know that once they are found the government will stop peering on our personal data. The answer is that we don't. It is this sole reason that causes me to deter the allowance of the government to have access to this technological data. At times our rights have to be compromised to ensure our safety, but when will we be certain that we will ever be fully safe again. It is arguments like this that continually give the government justification to continue their investigations through people's private matters.
Therefore, I would grant access to the government for these investigations if I could be assured there would be a set termination to the investigations. For example, if the information could not be found after a few months, then it would be halted. I believe this serves to establish the perfect medium between ensuring privacy rights while also ensuring the safety of the citizens of the United States.