Sources

1. Hall and Ball had climbed 16 mountains together and were celebrities in New Zealand.Gary Ball
2. In 1990 Ball summited Mount Everest with Peter Hillary and Rob Hall.Gary Ball
3. Ball and Hall climbed the Seven Summits in seven months in 1990.Gary Ball
4. Ball died in October 1993 of high-altitude pulmonary edema while climbing Dhaulagiri with Hall.Gary Ball
5. Rob Hall buried Ball's body in a crevasse on the mountain, and it was rediscovered ten years later.Gary Ball
6. Hall was appointed a Member of the Order of the British Empire in the 1994 Queen's Birthday Honours for services to mountaineering.Rob Hall
7. Hall was posthumously awarded the New Zealand Bravery Star in the 1999 New Zealand bravery awards.Rob Hall
8. Krakauer reached the summit and returned to camp, but four teammates, including group leader Rob Hall, died while descending in the storm.Jon Krakauer
9. Fifteen people died on Everest by the end of the 1996 climbing season, the deadliest single year in Everest history to that point.Jon Krakauer
10. Krakauer took part in a guided ascent of Mount Everest in 1996 and was caught in the disaster.Jon Krakauer