a nepali climber and guide, kami rita sherpa, is beginning an attempt to break the world record for the number of successful climbs to the top of mount everest. it's his 22nd ascent. that's all from me. stay with us here on bbc world news. now on bbc news, it's time for hardtalk. the to talk. i am stephen sackur. —— welcome at too hardtalk. —— welcome to. hundreds of billions of dollars is poured into cancer treatment and research every year. there are more effective tools to combat it than ever before, yet it kills close to ten million people every year. my guest is one of america's leading cancer specialists, siddhartha mukherjee. his book, the emperor of maladies, a self—styled biography of cancer, painted a unique picture of the disease, mixing memoirs, science, and a writer's sensibility. eight years on from its publication, is cancer any less of a curse? siddhartha mukherjee, welcomed the hardtalk. thank you. you are now oncologist, you also know are fated writer. you look at those two activities are is entirely separate or is the writing way of you following your calling as a doc