rock ’n’ roll photographer Bob Gruen, and invited him to the Record Plant studio in Midtown Manhattan. Lennon and his wife, Yoko Ono, were working on a new song there, called “Walking on Thin Ice.”Gruen had shot the iconic photo of Lennon wearing a T-shirt emblazoned with the words “New York City,” and they had established a friendship where the singer would regularly ask Gruen to photograph him.It was Friday afternoon, Dec.