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This is backstory, I'm Peter Onow.

In the aftermath of the mass shooting at Charleston's Emanuel AME Church, Americans have debated whether the shooting was simply the action of a violent individual or an act of terrorism.

It's a question with roots that go back at least to the early 20th century.

There are politicians who said some bad person committed this bad criminal act and we are going to bring that person to justice.

But then there are people who say actually what we need is a kind of ideological war.

But around the same time, officials essentially shrugged off a different kind of terrorism.

Lynchine was almost never prosecuted even when it was photographed.

What's kind of extraordinary is the papers noted that no members of the mob could be identified after the lynching.

A history of domestic terrorism today on backstory.

Major funding for backstory is provided by an anonymous donor, the National Endowment for the Humanities, the Joseph and Robert Cornell Memorial Foundation and the Arthur Vining Davis Foundations.

From the Virginia Foundation for the Humanities, this is backstory with the American History Guys.

Welcome to backstory. I'm Brian Vello and I'm here with Peter Onow.

Here they are Brian and Ed Ayers is with us.

Hello Brian. Now anyone who remembers the news reports about the Boston Marathon bombing last April may be struck by it similarly to a much older story.

This story begins in September 16th, 1920.

It was a fairly ordinary day. Weather was pretty nice.

This is Beverly Gage in a story in a Yale University.

And at some point that morning a horse-drawn cart rolled up next to the Morgan Bank at the corner of Wall and Broad.

At noon, the bells of Trinity Church began tolling.

The carriage was still parked there at the street corner.

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