Yusran first learned about the danger facing his teenage cousin, Elmi Febrianti, at an Indonesian tourist attraction in South Sulawesi when he got a phone call from a family member who sounded frantic. Elmi, a 17-year-old Indonesian student, had been at a popular photo spot in Apparalang, Bulukumba Regency, and had fallen into the sea in the afternoon on June 7 while taking a selfie on the picturesque limestone cliffs there. A friend who was with the teen at the time had called her family...