A sightseeing helicopter went missing Tuesday near a volcanic crater on Mt. Aso in Kumamoto Prefecture in southwestern Japan, with wreckage later found in the area, local firefighters and other sources said.Two passengers, a man and a woman from Taiwan, and the 64-year-old Japanese pilot were aboard the helicopter, which departed at 10:52 a.m. from a zoo in Aso. Contact was lost about 10 minutes later, according to the helicopter operator, Takumi Enterprise, in Okayama, western Japan.The missing chopper, a U.S.-made Robinson R44, was on a 10-minute tour. The whereabouts of the three remain …READ FULL ARTICLE