Wow. I live about 40 minutes from there. When they were trying to get a memorial built, I was dating a little tree hugger that lived, and worked there. She was VERY anti gun, as are most of the people that go and work there...in fact, there is a professor that teaches a class, solely based on how the Second Amendment is invalid, and not a right for people to own guns...or at least there used to be, about 20 years ago when I was with her. I was with her, when her, and her co workers were discussing the memorial, and how terrible it was that they couldn't get the funds they needed for the big spectacular monument they wanted, and someone made the mistake of asking my opinion...it wasn't received very well....and it wouldn't be here. However, at the time, all I really knew about it was, some hippies threw rocks at soldiers with guns...seems stupid, maybe they shouldn't be in the gene pool. Needless to say, I wasn't very well liked, and soon after we split.
Now, I feel a little different, I've read somethings, certain things were explained to me, and theories have come out...the one I believe is, a CIA agent, was taking photos of the protesters, and they didn't like it, so when they started to get a little bit "in his face", he drew his pistol and fired a couple rounds, which intern panicked the Guardsmen, and they in turn fired.
Yes, it was a tragedy, a needless one.
And the song is, "Ohio", by Crosby, Stills, Nash, and Young