Kristine Dans bends down to pick up a rock during a demonstration of the mobility of the Exploration Extravehicular Mobility Unit (xEMU), one of two NASA spacesuit prototypes for lunar exploration.

Kristine Dans bends down to pick up a rock during a demonstration of the mobility of the Exploration Extravehicular Mobility Unit (xEMU), one of two NASA spacesuit prototypes for lunar exploration.