<p>For Chris Bonington and Charles Clarke, long-time friends and expedition partners, few mountains were more alluring than Sepu Kangri. Known locally as 'the Great White Snow God', Tibet's nearly 7,000-metre mountain had never before been visited by Westerners. Armed only with a tourist map for reference, the two set off for this elusive peak in 1996.<br>In the reconnaissance and two expeditions that followed, neither of them were expecting to b...