In this handout photograph released by the Indonesian Navy on October 13, 2015, an Indonesian Navy diver rescues helicopter crash survivor Fransiskus Subihardayan after he was found by the search and rescue team in Lake Toba, western Sumatra island on October 13, 2015. An Indonesian man was found alive on October 13 floating naked in a huge volcanic lake two days after the helicopter he was travelling in is believed to have crashed into the waters, officials said. (Photo by AFP Photo/Indonesian Navy)
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