For two decades after 13-year-old Megumi Yokota vanished on her way home from school one November evening, Japanese police called her parents whenever they found an unidentified body. Unimaginably, the teenager had been abducted and taken to North Korea, her mother told a UN Commission of Inquiry panel in Tokyo on Thursday – but there was no clue what had happened to the cheerful girl who liked to sing. ”Up until then, whenever they found a body, or there was a murder, or a skeleton got snagged in the fishing net of a boat, anywhere…