Pete Seeger performs on a TV show in East Berlin, on Jan. 3, 1967.

Zentralbild—AP

Zentralbild—AP

Pete Seeger performs on a TV show in East Berlin, on Jan. 3, 1967.

Your browser, Internet Explorer 8 or below, is out of date. It has known security flaws and may not display all features of this and other websites.

Learn how to update your browser