In 1977 Robert Plant nearly stepped away from Led Zeppelin to become a public school teacher. During a recent interview with the BBC, the legendary vocalist says that the death of his five-year-old son and drummer John Bonham forever changed his outlook on life. "All of us had been thinking about what would happen next because the illusion had run its course. I'd already lost my boy and then you think, 'I really have to decide what to do,'" Plants says.