4 years ago, 12 Thai junior footballers and their coach were rescued after 18 days trapped in the cave. It was a dramatic rescue that involved sedating the children to get them away – and few thought it would succeed.
The BBC’s Jonathan Head revisits Titan, one of the boys preserved, and his coach, to find out what has happened since then, and extends back to the caves along with one of the rescuers exactly who got them away.
Read more: The entire story of Thailand’s extraordinary cave recovery