hina and Australia have joined the search for 12 boys missing in a Thai cave, as divers on closed in on the spot where they believe the teens are sheltering. The international rescue operation -- which includes over 1,000 people from Thai emergency services, the US Military and British cave experts -- has been ramping up its efforts since the boys and their 25-year-old soccer coach disappeared during an outing in the caves in northern Thailand eight days ago.