Dr Ellen Gallant tries to save the lives of those injured in avalanche . Spoke of her vision seeing a 25-year - old Sherpa die in front of her . disaster sparked by a 7.8 magnitude earthquake in Nepal . Four falls among 500 people dead after huge avalanche on Everest .
Dr Ellen Gallant battled to save the lives of those injured in avalanche . Spoke of her devastation seeing a 25-year-old Sherpa die in front of her . Earthquake sparked by devastating 7.8 magnitude earthquake in Nepal . Four Americans among 18 people dead after huge avalanche on Everest .