Yoon Young-Sook (only daughter of Grandmaster Yoon Byung-In) is reading her father's letter from 31 yrs ago, april 4, 1974, for  the first time. GM Yoon Byung-In's 2nd cousin brought it to her - he didn't realize he had it in storage until GM Kim Soo showed up and starting asking questions. She was 8 months old when her father dissapeared. She's now 56 and a doctor of internal medicine in Incheon, Korea.