A stricken climber left to die on Everest was saved by an American guide and a sherpa who found her by accident as they returned from the summit. The dramatic rescue of the Nepalese woman has reopened a passionate debate about mountaineering ethics, a year after the controversial death on the mountain of the British climber David Sharp. The woman, identified only as Usha, was found on Monday morning suffering from severe altitude sickness about 550 metres beneath the 8,848m (29,028ft) summit. She was at a similar altitude to the cave where Sharp died on May 15, 2006, after an...