For a few years, I've run into the same issue sometimes. Here are the things that I've found it could be: 1. If you have an IM client (AIM, Google Talk, Blackberry Messenger, etc) it could buzz but not show an icon on your screen.
Check those clients 2. If you have the GMail app, if you get a new piece of mail it will buzz but not show anything, so check any mail programs you have.3. If your battery is low, it will buzz to notify you 4.
Sometimes if your battery is so low that the radio antenna gets turned off, it will buzz to tell you.5. You know what? It's a computer (and a somewhat buggy one, at that).
Sometimes it just buzzes for no reason.
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I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.