I just read Into Thin Air, which was about the disaster that occurred on the mountain that very same season. In fact, the book talks about how the IMAX team was quick to offer their own people and resources (e.g., oxygen tanks) to the teams in trouble to help them get down, even though it put their own attempt at risk.
It was an excellent book and made me wish I had seen this movie will it was playing in an IMAX theater.