Because Russia was the only country with a permanent presence in space with Mir. Russia learnt a great deal with the successes and pitfalls of Mir. Most of the critical systems on the Iss are designed and built in Russia, in fact it's more of a Russian space station with international modules, but Russia will freely admit that America paid for it. America had several failed attempts at building their own spacestation, without the Russians it would never be up there.
I believe it was launched from Russia!
The International Space Station (ISS).
Currently right now the International Space Station is the only space station in orbit. It has however been the only space station with such international participation that it can be really be considered international. Countries, including the US, have sent astronauts to Russia's former space station Mir. Just because the International Space Station is international, doesn't necessarily mean that every country uses it. Their are 15 countries that contribute to the ISS program including the US, Russia, Canada, Japan, and several European countries.
Russia
As of May 2014, the International Space Station is currently being operated by Russia, the United States, France, Japan, and Canada. It is used extensively for space research and development.
The most famous international space station is the International Space Station (ISS), a collaborative project involving multiple countries, including the United States, Russia, Europe, Japan, and Canada. It serves as a research laboratory in space and is known for its continuous human presence in orbit since November 2000.
Albama, Moscow, U.S, Germany, France, Japan, Canada
It is named the International Space Station or ISS.
The International Space Station was made by multiple countries working together, including the United States, Russia, Europe, Japan, and Canada. Each country contributed different modules and components to construct the station.
Well the actual Station is divided between Russia and the US
Skylab was the first space station launched and operated by NASA from 1973 to 1979. The first space station was launched by the Soviet Union in 1971.The core module for the International Space Station was launched in 1998.
Some notable space stations currently in orbit include the International Space Station (ISS), Tiangong Space Station (China), and Mir-2 (Russia). These space stations are used for scientific research, international cooperation, and testing technologies for future space missions.