Jon Krakauer, 30 years after surviving Everest’s deadliest day, still worries about the climbing season. Everest’s season is off to a “terrible start” due to a Khumbu Icefall closure, delaying acclimatization. Krakauer’s bestselling memoir, “Into Thin Air,” about the 1996 tragedy, has a new edition. It’s been 30 years since Jon Krakauer survived one of the worst disasters on Mount Everest. But every spring, when climbing season on the world’s tallest peak hits, he still worries.