Though Russia's space agency, Roscosmos, has ferried seven tourists to the International Space Station (ISS) since 2001, America's National Aeronautics and Space Administration (NASA) has been opposed to the idea of commercializing the space lab. That changed on June 7, 2019, when the US space agency announced it will soon allow private-sector "astronauts" to spend up to 30 consecutive days aboard the space lab.