K2, triumph and tragedy

K2, "the savage mountain", is the second-highest peak in the world - and the most difficult to climb. In 1986, it was the site of both dazzling triumph and great loss as twenty-seven men and women reached the top but thirteen died trying. To this day it remains the single greatest tragedy in the history of mountaineering. Curran was there to record it all in words and photographs: courage and obsession, luminous success and thwarted ambition.