Robotic Refueling Mission 3 (RRM3): Today crewmembers installed the RRM3 hardware on the JEM Airlock slide table. Robotic Refueling Mission 3 (RRM3) demonstrates the first transfer and long term storage of liquid methane, a cryogenic fluid, in microgravity. The ability to replenish and store cryogenic fluids, which can function as a fuel or coolant, can …