Into Thin Air

by Jon Krakauer

When we got there, an examination of the oxygen cache immediately revealed that there were at least six full bottles. Andy, however, refused to believe it. He kept insisting that they were all empty, and nothing Mike or I said could convince him otherwise. The only way to know how much gas is in a canister is to attach it to your regulator and read the gauge; presumably this is how Andy had checked the bottles at the South Summit. After the expedition, Neal Beidleman pointed out that if Andy’s regulator had become fouled with ice, the gauge might have registered empty even though the canisters were full, which would explain his bizarre obstinacy. And if his regulator was perhaps on the fritz and not delivering oxygen to his mask, that would also explain Andy’s apparent lack of lucidity.