New Zealand's master among the masters

From 5Ks to marathons, New Zealand runner John Campbell has shattered every record in the over-40 record book. In an incredible 1990 season, John went undefeated as a master in 22 races, including wins in the Los Angeles and New York marathons. But it was at the Boston Marathon that year where he made his biggest mark, setting the Masters world record that was considered by many to be unbeatable. It's a feat that has since been overtaken - but he still holds the event record some 28 years later with a time of 2:11:04. Kathryn talks to John about his early years in Ravensbourne outside of Dunedin, and asks what next for the 69-year-old.