have been down there for two months and this could mean close to the end for a long, anxious wait for the families here. >> ♪ >> ♪ >> ♪ it looks like life, laundry, knitting, children, but it's not. since the first day, maria says, i have one thought. to know. to know her two sons, half a mile underground, are alive. they send messages in bottles, they watch giant machines roar by. but mostly, they wait. on rocks. in desert sun. to know. >> reporter: now, when that escape shaft is ready to go, the first man down will be a chilean navy medic, he'll test the condition of those 33 miners down there. it may be that one of the fittest, one of the strongest, might be the first ones up to test the system, then after him, some of the wacker miners, those with health problems, jon.