While expeditions to active volcanoes come with risks, experts say informed preparation can make the difference.  SINGAPORE: Every year, Mr Jeremy Tong takes expedition groups to some of Southeast Asia’s most popular mountains – among them Mount Kerinci, the highest active volcano in Southeast Asia and one of Sumatra’s most active. The draw is beauty and a sense of adventure, said Mr Tong, who runs a travel expedition company, JTrace, and has led expeditions for over 12 years. “When you climb