September 24, 1970
Volunteers John Pfeifer and Tom Busch continue to pound sizzling chisels into the permafrost for explosives expert Sam Tucker to pack with dynamite.
They shovel and bucket out debris 11 to 12 hours a day, taking only 10 minutes for lunch and dinner; the meals are delivered to them seven days a week by fellow mission volunteers.
The work is not finished until October 16.
