At 8am on 29 May 1999, Cathy O'Dowd, a 30-year-old mountaineer from South Africa, stepped onto the summit of Everest and into history. She had become the first woman to climb the highest mountain in the world from both its south (Edmund Hillary) and north (George Mallory) sides. To achieve this, Cathy has had to face the ultimate risks of Everest. During her first ascent from the south in 1996, she and her team were trapped in the killer storm...