With a space station medical evacuation safely completed, NASA is focused on two challenging missions proceeding in parallel: launching four astronauts on a flight around the moon, at the same time as the agency is planning to send four replacement astronauts to the International Space Station. Engineers plan to haul the Artemis 2 moon rocket to launch pad 39B at the Kennedy Space Center on Saturday for tests leading to launch early next month on a historic piloted flight around the moon. At