What was the initial phase of cooperation with Russia designed to test before the formal ISS partnership?

Answer

The Shuttle-Mir Program

The transformation of the International Space Station (ISS) program involved a pivotal strategic decision to incorporate Russia as a core partner, which was intended to leverage their deep experience in long-duration spaceflight while reducing the American financial commitment. The necessary groundwork and operational testing for this complex international relationship were conducted through the Shuttle-Mir Program. This program specifically involved sending seven American astronauts to the Russian Mir space station over a period spanning from 1995 to 1998, serving as a critical, functional testbed for managing joint operations in orbit before the official Intergovernmental Agreement was signed in January 1998.

What was the initial phase of cooperation with Russia designed to test before the formal ISS partnership?
HistorySpaceNASAAdministratorDan Goldin