tell usabout the most difficult parts of e ascent.s ithe most diffult part every time or es idier? >> we ave at 10:00 at night d climb ight toughout the nighandthat's when our body ist the wesebb an we climb up a sll beam of light fm our heatorcs and nothing else around us and psholocally that's eall really hd. we justhave to keep going to this spot called thbalcony and hopefully when the sun starts trie, the view jus invigorates us. so th six hours, i suppose fromhen wlea thegh camp ntilhe sun breaks and as on as the sun baks wow. i'm sitting here just down fr the summit andi ep pointing out this viebut it incrible. can see hundreds ofmilein every rectn. it is aolutely awe inspiring. >> you're wchinbbc news. >> union bank has puits global expertise toork for a wide rangeof companies. wh can we do for you? >> bbc world news.