>> the hammer came out with a cross painted in red. and i said to one of them, it's painted. the guy said yes. that wasn't there. i said are you sure? yes, minister, i'm beep sure. that there wasn't anything. >> and then in the hammer there was tied a plastic bag with a message inside. >> it's a note from one miner to his wife. then workers notice something else. >> and we start digging and we took the paper. and we opened it. and i see the message. [ cheers ] >> a message that triggers an impossible rescue.