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THIS DAY IN HISTORY: NASA Astronauts Conduct Final Preparations for Historic Apollo-Soyuz Test Project in 1975

By  //  July 10, 2025

July 10, 1975

On this day in 1975, NASA astronauts Deke Slayton, Tom Stafford, and Vance Brand were deep into final preparations for the historic Apollo-Soyuz Test Project (ASTP).

BREVARD COUNTY, FLORIDA – On this day in 1975, NASA astronauts Deke Slayton, Tom Stafford, and Vance Brand were deep into final preparations for the historic Apollo-Soyuz Test Project (ASTP).

Just days from launch, the crew spent their time in a strict three-week preflight quarantine—balancing health safety with intense simulations, language training, and mission rehearsals.

The Apollo-Soyuz mission would become the first international crewed spaceflight, marking a major step in U.S.-Soviet cooperation during the Cold War. 🌍🤝

Slated to rendezvous and dock with a Soviet Soyuz spacecraft in orbit, the mission symbolized not just technological achievement, but the power of diplomacy through space exploration.