Gathering historical materials for the real-time site for Apollo 13 took a team of researchers eight months. Footage sourced includes all the mute 16mm film from Mission Control, supplied by Slater and synchronised to the audio wherever possible, and all the photos, film and television footage shot by the astronauts. The video and audio for the project were digitized and restored by a team of historians, researchers, and audio, film and visual experts. The Apollo 13 real-time site includes over 7,300 hours of audio and video. Apollo 13 in real-time includes four audio tapes from the time of the explosion that had been missing and were only recovered from the National Archives in the fall of 2019. It is the first time this audio has been heard since the 1970 accident investigation.
