Editing Karl Gordon Henize (section)

==Death==

Henize, on leave from NASA at the time, went on a hiking expedition to Mount Everest with British research group High Adventure BVI.<ref name=wapo>{{cite news |url=https://www.washingtonpost.com/archive/local/1993/10/09/former-astronaut-karl-henize-dies/2bd5e84d-c902-4e06-b399-bbc7589eb4a5/ |title=Former Astronaut Karl Henize Dies |newspaper=[[The Washington Post]] |access-date=April 23, 2019}}</ref> Henize intended to test the Tissue Equivalent Proportional Counter (TEPC) at different altitudes: {{convert|17,000|ft}}, {{convert|19,000|ft}}, and {{convert|21,000|ft}}. The TEPC would reveal how people's bodies would be affected, including the way bodily tissues behaved, when struck by radiation, which was important for the planning of long duration space missions.<ref>{{cite book |first=Tom |last=Read |author-link=Nish Bruce |title=Freefall |page=224 |publisher=[[Little Brown]] |year=1998 |isbn=0-316-64303-3}}</ref> The data would be shared with NASA and BVI.<ref name=nasarel />

Henize acclimatized at [[Kathmandu, Nepal]], followed by acclimatization at expedition base camp in China. Henize, with three members of High Adventure BVI, began the hike on October 4, 1993. Henize reported breathing problems on their way to advanced base camp; they were at {{convert|22,000|ft}}. Treatments with oxygen failed, and they returned to base camp. On October 5, Henize died in his sleep. The cause of death was determined to be [[high altitude pulmonary edema]] (HAPE).<ref>{{cite news |url=https://www.independent.co.uk/news/people/obituary-karl-henize-1512511.html |newspaper=[[The Independent]] |title=Obituary: Karl Henize |last=Bond |first=Peter |date=October 23, 1993}}</ref><ref>{{cite book |first=Tom |last=Read |title=Freefall |pages=224–35 |publisher=Little Brown |year=1998 |isbn=0-316-64303-3}}</ref> Henize, aged 66, was buried near the [[Changtse|Changtse Glacier]].{{sfn|Shayler|Burgess|2007|p=521}}  He was survived by his wife, Caroline, and four children.<ref name=nasarel>{{cite web |publisher=[[NASA]] |archive-date=April 20, 2005 |date=October 8, 1993 |title=Press Release: Former Astronaut Karl Henize dies on Mt. Everest Expedition |last=Carr |first=Jeffrey |id=93-077 |archive-url=https://web.archive.org/web/20050420201954/https://www.nasa.gov/centers/johnson/news/releases/1993_1995/93-077.html |url=https://www.nasa.gov/centers/johnson/news/releases/1993_1995/93-077.html}}</ref>