The International Space Station is an orbital structure that houses cosmonauts from different countries. The only joint project in space research carried out between the superpowers, the ISS is the results of seven years of work put in by France, the United States, Japan, and Russia. The cosmonauts rotate every seven months, with two of five cosmonauts onboard remaining after each rotation. The ISS is supplied by shuttles launched from Siberia, although each of the four nations contribute. The ISS has escape modules that will take cosmonauts to one of five locations nearest the ISS: the Pacific Space Station, the Moon, the Lunar Space Station, the Russian Imperial Station, or back to Earth.