Guinness endurance record-holder Martin Parnell, who ran 250 marathons in 2010 for a charity, recalls the moment he decided to run alongside pioneering women in Afghanistan defying insults and threats to run secret marathons for freedom. It came in 2015 after Parnell suffered a life-threatening blood clot and facing dark despair one day read an article about Zainab, the first woman to run an official marathon in Afghanistan against local customs.