On Saturday, legendary musician Paul McCartney joined the "March For Our Lives" rally in New York City, and was spotted not too far from the place where former bandmate, John Lennon, was shot and killed in 1980. According to a report by Business Insider, McCartney was wearing a shirt that read, "we can end gun violence." When asked by CNN's Jason Carroll if he believed change could occur, McCartney said, "I don't know. But this is what we can do, so I'm here to do it.