An ambulance leaves from the Tham Luang cave area as the operations continue for those still trapped inside the cave in Khun Nam Nang Non Forest Park in the Mae Sai district of Chiang Rai province on July 10, 2018. Rescuers raced to save four young footballers and their coach who remain trapped in a flooded Thai cave on July 10, as heavy rains threatened an already perilous escape mission that has seen eight of the boys extracted in “good health”. / AFP PHOTO / YE AUNG THUAn ambulance leaves from the Tham Luang cave area as the operations continue for those still trapped inside the cave in Khun Nam Nang Non Forest Park in the Mae Sai district of Chiang Rai province on July 10, 2018. Rescuers raced to save four young footballers and their coach who remain trapped in a flooded Thai cave on July 10, as heavy rains threatened an already perilous escape mission that has seen eight of the boys extracted in “good health”. / AFP PHOTO / YE AUNG THUAn ambulance leaves from the Tham Luang cave area as the operations continue for those still trapped inside the cave in Khun Nam Nang Non Forest Park in the Mae Sai district of Chiang Rai province on July 10, 2018. Rescuers raced to save four young footballers and their coach who remain trapped in a flooded Thai cave on July 10, as heavy rains threatened an already perilous escape mission that has seen eight of the boys extracted in “good health”. / AFP PHOTO / YE AUNG THUA Thai military police salutes an ambulance leaving from the Tham Luang cave area as the operations continue for those still trapped inside the cave in Khun Nam Nang Non Forest Park in the Mae Sai district of Chiang Rai province on July 10, 2018. Rescuers raced to save four young footballers and their coach who remain trapped in a flooded Thai cave on July 10, as heavy rains threatened an already perilous escape mission that has seen eight of the boys extracted in “good health”. / AFP PHOTO / YE AUNG THUA Thai military police salutes an ambulance leaving from the Tham Luang cave area as the operations continue for those still trapped inside the cave in Khun Nam Nang Non Forest Park in the Mae Sai district of Chiang Rai province on July 10, 2018. Rescuers raced to save four young footballers and their coach who remain trapped in a flooded Thai cave on July 10, as heavy rains threatened an already perilous escape mission that has seen eight of the boys extracted in “good health”. / AFP PHOTO / YE AUNG THUAn ambulance leaves from Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 10, 2018. REUTERS/Soe Zeya TunA group of ambulances go in to Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 10, 2018. REUTERS/Soe Zeya TunA group of ambulances go in to Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 10, 2018. REUTERS/Soe Zeya TunA helicopter carrying rescued schoolboys approaches to land at a military airport in Chiang Rai, Thailand, July 10, 2018. REUTERS/Tyrone SiuA helicopter carrying rescued schoolboys lands at a military airport in Chiang Rai, Thailand, July 10, 2018. REUTERS/Tyrone SiuAn ambulance carrying rescued schoolboys leaves a military airport in Chiang Rai, Thailand, July 10, 2018. REUTERS/Tyrone SiuOnlookers wave as an ambulance carrying rescued schoolboys leaves a military airport in Chiang Rai, Thailand, July 10, 2018. REUTERS/Tyrone SiuAn ambulance leaves from Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 10, 2018. REUTERS/Soe Zeya TunAmbulances leave from Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 10, 2018. REUTERS/Soe Zeya TunAn ambulance believed to be carrying one of the rescued boys from the flooded cave in Mae Sai, heads to the hospital in Chiang Rai as divers continue evacuating the remaining boys and their coach trapped at Tham Luang cave in the Mae Sai district of Chiang Rai province, northern Thailand, Tuesday, July 10, 2018. (AP Photo/Vincent Thian)An emergency team rushes to a helicopter believed to be carrying one of the rescued boys from the flooded cave in Mae Sai as divers continue to extract some of the 12 boys and their coach trapped at Tham Luang cave in the Mae Sai district of Chiang Rai province, northern Thailand, Tuesday, July 10, 2018. Thai Navy SEALs say all 12 boys and their coach were rescued from the cave, ending an ordeal that lasted more than 2 weeks. (AP Photo/Vincent Thian)A helicopter believed to be carrying one of the rescued boys from the flooded cave lands in Chiang Rai as divers continue to evacuate more of the boys and their coach trapped at Tham Luang cave in the Mae Sai district in Chiang Rai province, northern Thailand, Tuesday, July 10, 2018. (AP Photo/Vincent Thian)Local police place umbrellas around an evacuation helicopter as the remaining trapped boys and their coach are extracted from a cave in Mae Sai, Chiang Rai province, northern Thailand on Tuesday, July 10, 2018. (AP Photo/Sakchai Lalit)