I think you all have a very biased view. If you read the facts, or watch the documentaries, you will see that these people were not marching "Peacefully", and while the response of the army may have been extreme, the marchers were not totally innocent.
It is widely believed that republicans (the civilians) fired the first shot, and there have beenallegations that it was shot by a Mr Matin Maginnis, IRA member, now the NI minister for education who has spent a lot of time in jail.
Just presenting the other side of the coin. You seem to have been told a very one sided story