On the Front of the Chilean Miners' T-Shirts:
'Gracias Senor' - which means – 'Thank you Lord.'
On the back of the Chilean Miners' T-Shirts:
Psalm 95:4, which says, "In His hand are the depths of the earth, and the mountain peaks belong to Him."
You can read more of the story on the CNN website: The story behind the Chilean miners' Jesus T-Shirts – CNN Belief Blog