The Greater Narellan Business Chamber proudly presents: Andrew Lock OAM SUMMIT SECRETS - High Performance at the Highest Altitudes Andrew Lock is the most accomplished high altitude mountaineer in Australian history and one of the world’s most sought after remote area expedition leaders. He is the only Australian, indeed the only member of the British Commonwealth, to have climbed all of the world’s 8000 metre - death zone - mountains, an odyssey sixteen years in the making. But success did…