LOS ANGELES (Reuters) - Marty Balin, a co-founder of the legendary rock band Jefferson Airplane, has died at the age of 76, Rolling Stone and Variety reported on Friday. FILE PHOTO: Musician Marty Balin arrives at the 58th Grammy Awards in Los Angeles, California February 15, 2016. “With heavy hearts, we learn today of the passing of Marty Balin. We send his family and friends our deepest condolences,” the group said.