On May 4th, 1970, Ohio National Guard troops opened fire on Kent State students protesting the invasion of Cambodia, the escalation of the Vietnam War - and the presence of the guard on campus.

Four students died; nine were wounded.

The scene became an icon for the Baby Boom generation. And this year, it was added to the National Register of Historic Places, as a site that contributed significantly to the understanding of the nation's history and culture.

But for many, the history is not national. It's personal. And while it's fading out of many textbooks and memories, it's fresh in the lives of many others.

WKSU is taking a look at the personal stories and larger lessons that grew from May 4, 1970.