In this June 18, 1967 photo, Jimi Hendrix performs at the Monterey Pop Festival in Monterey, Calif. Before Burning Man and Bonnaroo, Coachella and Lollapalooza, Glastonbury and Governors Island, there was Monterey Pop. Fifty years ago in June 2017, the three-day concert in the San Francisco Bay area gave birth to the "Summer of Love'' and paved the way for today's popular festivals. (Monterey Herald via AP)