Chile's Rescue Formula: '75% Science, 25% Miracle' - WSJ.com
100% a miracle!
Faith was the key factor, the presence of God. An incredulous world was able to watch by the billions, how very simple people kept going by simple and pure faith.
Science was a key factor of course, and so was engineering, but they could only be useful in the presence of love for humanity and the willing to help and be there in the moments that count.
Important is to observe that saving these miners was placed at the front of every other consideration of pride and it was the appeal to engineering knowledge which was determinant.
This is a triumph 100% of faith, and yes, it is a miracle, 100% as well, specially in a world where human dignity is so ill treated and scarce.