New York Idea: You Have the Right to Remain Silent?

Whilst Travelling through customs upon arrival in Newark Airport NY certain things got me thinking. I was expecting the security checks to be extremely tight for understandable reasons, but as I Had my photograph taken, my fingerprints scanned and then was asked a series of questions in an intimidating fashion, I wondered what happens to that information once I have been let into the country? Could the US Government use it to check up on me if they felt a need to?