Peter Yarrow, iconic folk singer and co-writer of 'Puff the Magic Dragon', died at 86 due to bladder cancer. Yarrow was a key figure in the 1960s folk revival and a civil rights advocate. Esteemed for his contributions to music with the trio Peter, Paul and Mary, he is remembered for hits like 'Leaving on a Jet Plane'. His death leaves Paul Stookey as the only surviving member of the group, following Mary Travers' passing in 2009. Yarrow's legacy is marked by his musical achievements and activism, despite a controversial past.