JSC2008-E-004100 (11 Jan. 2008) --- John Byard, Wyle Research and Test Operations Safety Officer, runs on the Standalone Zero Gravity Locomotion Simulator (sZLS) at the University of Texas Medical Branch (UTMB) at Galveston, Texas. James Brent Crowell, right, Wyle exercise physiologist, serves as the operator of the device.