The investigation into the crash of a South Korea passenger jet gathered pace on Wednesday as bereaved families began to prepare funerals after authorities finished formally identifying the 179 victims of the country’s worst air disaster. The transport ministry said South Korean investigators have extracted the data from the plane’s cockpit voice recorder and will convert it into an audio file, critical information to try to explain the few minutes that led up to the crash. The investigation team is still working to extract the contents of the flight data recorder, which was found missing a key connector, the ministry said.