Ohio / Machine Gun (The Isleys Bros. at the Bitter End, New York City, NY - 1972)

Canadian Neil Young wrote the lyrics to "Ohio" after seeing the photos of the Kent State massacre in Life Magazine.

"It's still hard to believe I had to write this song. It's ironic that I capitalized on the death of these American students. Probably the most important lesson ever learned at an American place of learning. David Crosby cried after this take," Young said.

Crosby said that Young calling Nixon's name out in the lyrics was “the bravest thing I ever heard.”

Author Dorian Lynskey writes in the book 33 Revolutions per Minute: "Ohio" is perhaps the most powerful topical song ever recorded: moving, memorable, and perfectly timed. "

After the double's release, it was banned from some AM radio stations because of the challenge to the Nixon Administration in the lyrics, but received airplay on underground FM stations in larger cities and college towns.

But it turned out to signify the end of the era of protest song-writing which had begun with the folk revival rather than a thrilling rebirth."