Neil Young's "Ohio"
Crosby, Stills, Nash and Young's 1970 anthem Ohio paid tribute to the four students killed at Kent State University. (Akron Beacon Journal file photo)
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May 4th1970 Shootings - 24th anniversary - Crosby Still & Nash sing at the 24th Anniversary of the May 4, 1970 shootings on campus. (Akron Beacon Journal file photo)
Graham Nash, left, performs with David Crosby at Kent State University in this May 4, 1997, file photo. (AP Photo/Jeff Glidden, File)