Liquid waste is vented to space. During STS-46, one of the fans malfunctioned, and crew member Claude Nicollier was required to perform in-flight maintenance (IFM). An earlier, complete failure, on the eight-day STS-3 test flight, forced its two-man crew (Jack Lousma and Gordon Fullerton) to use a fecal containment device (FCD) for waste elimination and disposal. International Space Station There are two toilets on the International Space Station, located in the Zvezda and Tranquility modules. They use a fan-driven suction system similar to the Space Shuttle WCS. Liquid waste is collected in containers. Solid waste is collected in individual micro-perforated bags, which are stored in an aluminum container. Full containers are transferred to Progress for disposal. An additional Waste and Hygiene Compartment is part of the Tranquility module launched in 2010. In 2007, NASA purchased a Russian-made toilet similar to the one already aboard ISS rather than develop one internally. On May 21, 2008, the gas–liquid separator pump failed on the 7-year-old toilet in Zvezda, although the solid-waste portion was still functioning. The crew attempted to replace various parts, but was unable to repair the malfunctioning part. In the interim, they used a manual mode for urine collection. The crew had other options: to use the toilet on the Soyuz transport module (which only has capacity for a few days of use) or to use urine-collection bags as needed. A replacement pump was sent from Russia in a diplomatic pouch, so that Space Shuttle Discovery could take it to the station as part of mission STS-124 on June 2. Other designs The Soviet/Russian Space Station Mir's toilet also used a system similar to the WCS. While the Soyuz spacecraft had an onboard toilet facility since its introduction in 1967 (due to the additional space in the Orbital Module), all Gemini and Apollo spacecraft required astronauts to urinate in a so-called "relief tube", in which the contents were dumped into space, while fecal matter was collected in specially-designed bags. The facilities were so uncomfortable that, to avoid using them, astronauts ate less than half the available food on their flights. The Skylab space station, used by NASA between May 1973 and March 1974, had an onboard WCS facility, which served as a prototype for the Shuttle's WCS, but also featured an onboard shower facility. The Skylab toilet, which was designed and built by the Fairchild Republic Corp. on Long Island, was