What heroic efforts did neil biedelman, stuart hutcbinson,and anatoli boukreev make to save the climbers in the huddle?

Beidleman leads wayward climbers down a gentler incline that leads over the Tibetan side.  Boukreev goes back out and gets the incapacitated Pittman and Fox back to the tents.  Despite being cold and exhausted, Stuart Hutchinson ventures out several times into the storm banging pans together to look for hikers.