STS-86 (Atlantis / Mir)

Background

By the mid-1990s, the United States and Russia had transformed a half-century of space-race rivalry into an ambitious cooperative venture. The Shuttle–Mir Program, formally known as Phase One of the International Space Station effort, sent American astronauts to live aboard the Russian station for extended tours while Russian cosmonauts flew aboard the Space Shuttle. Each mission refined the procedures, hardware interfaces, and interpersonal trust that the two agencies would need when they eventually built and operated the ISS together. STS-86 was the seventh docking mission in that series, and it carried that cooperation to a new milestone.

Atlantis was rolled to Launch Complex 39A at Kennedy Space Center and lifted off on 25 September 1997, carrying a crew of seven: commander James Wetherbee, pilot Michael Bloomfield, mission specialists Vladimir Titov, Scott Parazynski, Jean-Loup Chrétien, and Wendy Lawrence, and payload specialist David Wolf. Wetherbee was commanding his second docking flight to Mir, bringing valuable procedural continuity to the mission. Titov, a veteran cosmonaut, was making his second Shuttle flight. Chrétien, a French spationaut with the European Space Agency, became one of a small number of non-American, non-Russian individuals to visit Mir. Wolf, a physician-astronaut, was traveling to the station not merely as a visitor but as a resident: he was scheduled to begin a long-duration increment aboard Mir, replacing Michael Foale, who had endured the harrowing aftermath of the June 1997 Progress collision with the station.

The Flight

Approximately eight and a half minutes after liftoff, Atlantis reached orbit. Over the following two days the crew conducted the standard series of phasing burns that gradually closed the distance between the Shuttle and the station. Roughly fifty hours into the mission, Wetherbee guided Atlantis to a docking with Mir, using the Androgynous Peripheral Docking System at the Shuttle's Orbiter Docking System. The hatches were opened and the combined crew began a week of joint activity aboard the linked vehicles.

The primary crew-transfer objective was accomplished almost immediately: David Wolf floated across to Mir and formally joined the station's resident crew, while Michael Foale—who had spent more than four months aboard, including the tense weeks following the depressurization scare caused by the Progress collision—prepared to return home with Atlantis. The exchange symbolized the program's intent not merely to visit Mir but to sustain an American presence there long enough to accumulate genuine knowledge about long-duration spaceflight physiology, operations, and international partnership.

Historic Spacewalk

The most operationally significant event of STS-86 was a spacewalk conducted by Scott Parazynski and Vladimir Titov—a first in the history of human spaceflight. For the first time, an American astronaut and a Russian cosmonaut performed an extravehicular activity together in open space. The two spent approximately five hours outside the docked stack, retrieving experiment packages that had been affixed to the exterior of Mir and transferring equipment, including a Solar Array Cap that had been prepared to cover a damaged section of the station's Spektr module. The Spektr module had been depressurized since the Progress freighter struck it in June, and the cap was intended as a contingency measure in ongoing repair efforts.

The symbolic weight of the spacewalk was considerable. Since the late 1950s, spacewalks had been national achievements—Soviet or American, performed in national suits using national procedures. Parazynski and Titov worked from the Shuttle's airlock using American EMU suits, but the mission planning, safety reviews, and execution had been a joint product of both space agencies. Controllers in Houston and their counterparts at the Russian Mission Control Center in Korolev, outside Moscow, both monitored the EVA in real time. It was, in miniature, a preview of the multinational spacewalks that would become routine on the ISS.

During the docked phase the crews also transferred more than 1,500 pounds of water, equipment, and supplies between the vehicles, a logistics task that was itself a core argument for the Shuttle–Mir Program: the Shuttle's large payload capacity made it an effective resupply vehicle while simultaneously delivering and retrieving crew.

Undocking, Return, and Legacy

After roughly nine days of docked operations, Atlantis undocked from Mir at approximately 138 hours and 53 minutes into the mission. The two spacecraft performed a brief fly-around before Atlantis departed the vicinity of the station. The remaining flight days were devoted to on-orbit experiments and systems checkouts before the crew prepared for reentry.

The deorbit burn was executed at approximately 258 hours and 40 minutes mission-elapsed time, committing Atlantis to reentry over the Pacific. Just under an hour later, at roughly 259 hours and 21 minutes, Atlantis touched down on Runway 15 at Kennedy Space Center, completing the mission and returning Michael Foale—along with the rest of the Atlantis crew—safely to Earth.

STS-86 reinforced several critical lessons. Foale's debriefings gave NASA and RSA engineers an unfiltered account of operating a damaged station under stress, information that directly influenced emergency procedures for the ISS. Wolf's arrival meant the American presence aboard Mir continued uninterrupted, sustaining the longitudinal medical data set that researchers needed. And the joint spacewalk established a procedural and psychological precedent: crews from different nations, trained in different traditions and wearing different suits, could plan and execute a complex EVA as a single, integrated team.

When construction of the International Space Station began the following year, the working relationships, communication protocols, and mutual confidence built through missions like STS-86 were not peripheral background—they were the foundation. The first joint US-Russian spacewalk performed by Parazynski and Titov outside the docked Atlantis and Mir stands as one of the quiet but essential steps by which two former adversaries built something neither could have constructed alone.