//International Space Station marking 20 years of people living in orbit

International Space Station marking 20 years of people living in orbit

The International Space Station was a cramped, humid, puny three rooms when the first crew moved in. Twenty years and 241 visitors later, the complex has a lookout tower, three toilets, six sleeping compartments and 12 rooms, depending on how you count.Monday marks two decades of a steady stream of people living there.Astronauts from 19 countries have floated through the space station hatches, including many