I don't know what kind of resolution you need, but given network and page rendering latencies, it's going to be impossible to get client-server agreement to much better than a second. I would suggest you do an ajax poll every 5 or 10 seconds, and adjust your timer accordingly. There is also comet which is essentially "reverse" ajax, which can push the times to the client.
But either way, you still have network and renderign latencies to contend with.
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.