Hidden Messages Found in Computer Code of Apollo Moon Mission Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Harrison H Schmitt, pilot of the lunar module, stands on the lunar surface near the United States flag during NASA's final lunar landing mission in the Apollo series 13 December 1972. ( NASA/Universal History Archive / Getty ) Produced by PRI and WNYC