NASA technicians go through the painstaking process of replacing tiles on the enormous belly of the Shuttle, which routinely takes place at one of the three Orbiter Processing Facility (OPF) hangars located at Kennedy Space Center. It requires the meticulous attention of dedicated technicians to keep the Shuttle’s tile heat-shield system in excellent working order. Adhered to the underbelly of the Shuttle, the approximately 24,000 reusable, individually encoded silicon tiles provide the craft with protection against reentry temperatures that can reach as high as 2300 degrees Fahrenheit.