Astronauts Jim Parker and Michael Murphy, aboard the space shuttle Charger II, were wrapping up a routine mission. Just prior to re-entry, they encountered a mysterious cloud bank in space and were never heard from again. Two years later, a metal box was unearthed at a construction site in St. Louis. In it was a previously unknown, yet apparently authentic, journal of the historic Lewis and Clark expedition: written by astronaut Jim Parker. Did Parker and Murphy alter history, or did they save it? Download and start listening now!