3D printed windpipe surgery 'changes Derry girls life'

Like any seven-year-old girl, little Katie Parke loves playing with her friends at school but until recently that was practically impossible because of a rare life-threatening lung condition she developed as a toddler. Now her mother says her life has changed significantly after doctors at Great Ormond St Children's Hospital used a 3D printer to make a model of her windpipe, before carrying out the vital surgery. Our reporter Teresa Craig has been to meet Katie, her mum Sharon and the principal of Glendermott Primary School, Shirley McKenna..