I wouldn't think one or two viewings of child pornography would be detrimental. However, those guys that work for the government are wicked good with computers. I learned at an early age from my father that everywhere you go, you leave a trail. Even if you delete the history, disk cache, etc...EVERYWHERE and EVERYTHING you ever do is accessible FOREVER (until the computer is destroyed). I had a tendency to access sites a couple years before I was legally allowed to, and my dad had a tendency to find out. I never figured out how, though...