Dublin Zoo’s Gerry Creighton on how elephants never forget

Gerry Creighton was a zookeeper in Dublin Zoo for 37 years as was his dad before him.  His new book "Raised by the Zoo" shares some incredible stories of his career and childhood spent in the Phoenix Park when animals were often brought home at the end of the time for hand-rearing.  He tells us an incredible story too about how elephants never forget.