Early Edition with Kate Hawkesby

Cricket legend Chris Cairns says he is ready to tackle the greatest challenge he has ever faced as he begins rehabilitation following a serious health scare.The former Black Cap, 51, collapsed in Canberra last month after suffering a massive heart attack, resulting in an aortic dissection, or a tear in the inner layer of the body's main artery.During life-saving emergency heart surgery in Sydney, Cairns then suffered a stroke in his spine, resulting in paralysis in his legs.Cairns' family said last month that he would be undertaking a significant rehabilitation process at a specialist spinal hospital, and tonight the former all-rounder posted a video on social media to update fans on his condition."Just over six weeks ago I suffered a type A aortic dissection, which essentially means there's a tear in one of the major arteries of the heart," Cairns said. "I had several surgeries and grafts and, very thankfully, the specialists were able to save the heart itself."One of the complications that arose was a spina