By Becky Schlikerman ChicagoTribune Published:March 22, 2012 CHICAGO— For 60 years, Army Cpl. Chester Roper’s family wondered what happened to the young man who went to fight in the Korean War. All they knew for certain was that the 20-year-old fromPittsburghwent missing and was never heard from again. Without confirmation of his death, the family …