On 23 June, 12 boys went exploring in Thailand's Chiang Rai province with their football coach - and ended up trapped deep inside a cave underneath a mountain. The BBC's Helier Cheung and Tessa Wong were at the scene as a dramatic rescue bid gripped the world. What happened over those two weeks is a remarkable story of friendship, human endurance - and the lengths some people will go to save someone else's child. Here our reporters tell the full story of the Wild Boars.
The birthday party that went wrong It all began with a birthday.
On Saturday 23 June, Peerapat "Night" Sompiangjai turned 17 - a milestone most young people around the world would want to celebrate in style.
But Night wasn't rushing home that day. He was out with his friends, the other members of local youth football team the Wild Boars, and their assistant coach, Ekkapol "Ake" Chantawong.
When their football practice ended, they raced through the rice paddies on their bicycles and up into the forested hills that lately had been blanketed in rain.
Their destination: the Tham Luang cave, a favourite haunt for the boys, who loved exploring the nooks and crannies of the mountain range towering over Mae Sai.
Once at the mouth of Tham Luang, they stashed their bikes and bags by the cave entrance.
The team and their young coach had often ventured deep into Tham Luang, sometimes as far as 8km, for initiation rites where they would write the names of new team members on a cave wall.
In high spirits, they clambered into the cave with just their torches. They didn't need much else - after all, they were only planning to be there for an hour.
They would not emerge until two weeks later.
Back at Night's home, his family began to worry. His birthday cake sat untouched.
Where were the Wild Boars?
Snaking for 10km beneath the cloud-swathed mountain range that separates Thailand and Myanmar is Tham Luang, the fourth biggest Thai cave system.
Named after a mountain shaped like a reclining woman, its full name is Tham Luang Khun Nam Nang Non - "the great cave and water source of the sleeping lady mountain". Rich in folklore, it is a popular destination for day-trippers - and adventurous children.
It has its dangers - people have gone missing in Tham Luang before. And once monsoon season starts in July, the cave goes from innocuous to extremely dangerous.
The cave can flood up to 5m (16ft) during the rainy season, and should only be entered between November and April.
"The water is moving, it's muddy and there is almost no visibility," local guide Joshua Morris told the BBC.
And once the cave floods - it's risky even for experienced divers.
Almost everyone in Mae Sai knows this. So when the parents of the Wild Boars began to worry about their missing boys, they headed straight to the cave. The boys' plans to visit Tham Luang had been discussed in a group chat on a messaging app with other friends.
They found the bikes, the bags, and some football shoes outside. They raised the alarm.

https://mobileinfoworld.com/the-full-story-of-thailands-extraordinary-cave-rescue/