I'm not all that impressed with the long Soviet stay times on Salyut and Mir. Basically just boring holes through LEO. Day after day, month after month. and the Clinton Admin. brought the Russians into the ISS project in order to give ex Soviet engineers and scientists something to do (though it was sold as a cost cutting move by the U.S., the United States actually PAID the Russians to work on it). There is no doubt that the U.S. couldn't have completed the space station all on its own. The Russians have never even sent an unmanned probe beyond Mars. The U.S. has sent six. All successfully.