Two full bottles were waiting for them at the South Summit; if Hall had known this he could have retrieved the gas fairly quickly and then climbed back up to give Hansen a fresh tank. But Andy Harris, still at the oxygen cache, in the throes of his hypoxic dementia, overheard these radio calls and broke in to tell Hall—incorrectly, just as he’d told Mike Groom and me—that all the bottles at the South Summit were empty.
