Iron discipline key for Los 33

The last miner to be rescued, Luis Urzua, center, gestures as Chile's President Sebastian Pinera, right, looks on. Photo / AP.
They may not take kindly to being called fortunate, given the fear and discomfort they endured for 70 days.
But from the moment they were trapped underground, the 33 men in the San Jose mine benefited from crucial strokes of good luck. The rockfall that trapped them ..