I was in the military, with a clearance. You describe it reasonably well. A clearance means you can have access, if needed. I am completely against collection of information as they are doing because of time. A warrant gives them access to data from all time. This is a departure from current warrants that allow them to collect and examine data starting now (or as far back as it was stored by external parties). It's the difference between getting a warrant to wiretap a phone and getting a warrant to listen to every phone call ever made with a phone. In my mind, a warrant says we have have reasonable suspicion to collect more information as it stands right now, not reasonable suspicion to examine past behavior. Then again, I believe that the U.S.'s definition of rights are great and should be extended to all humans by the U.S., not just citizens or those on U.S. soil.