the bottom. then the radio told me i need to come out. i said i can't. i just got started. they said you have been in there almost three hours. you need to come out and rest. >> they dug the parallel shaft and as they dug the horizontal. it was blunting their jackh jackhammers. >> it's frustrating. the drill bits can't do anything with that rock. >> hour after hour after hour and only getting inches at a time. >> as the sun's rays began to disappear rescue workers continued to use all their strength to reach here. >> good evening, the nightmare is now in its 12th hour. >> jessica mcclure appears to be sleeping right now. >> as we went into the first