An American team had gained a permit to climb K2 in the summer of 1995. K2 is regarded as a significantly more difficult and dangerous climb than Mount Everest. By August 13, 1995, the remnants of the U.S. team and Alison Hargreaves had joined forces with a New Zealand and Canadian team at Camp 4, around above sea level, and at least 12 hours from the summit. Later that day, having joined with a Spanish team of mountaineers above Camp 4, New Zealander Peter Hillary, son of Everest pioneer Sir Edmund Hillary, decided to turn back, noting that the weather that had been fine for the previous four days appeared to be changing. At 6:45 p.m., in fine conditions, Alison Hargreaves and Spaniard Javier Olivar reached the summit, followed by American Rob Slater, Spaniards Javier Escartín and Lorenzo Ortíz, and New Zealander Bruce Grant. All six died in a violent storm while returning from the summit. Canadian Jeff Lakes, who had turned back below the summit earlier, managed to reach one of the lower camps but died from the effects of exposure.