Support WBURPete Seeger And The Public ChoirLinda HolmesJanuary 28, 2014 SharePete Seeger performs during a concert marking his 90th birthday at Madison Square Garden in New York on May 3, 2009. (AFP/Getty Images)
Pete Seeger performs during a concert marking his 90th birthday at Madison Square Garden in New York on May 3, 2009. (AFP/Getty Images)