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ISS Assembly Mission 4R
ISS Assembly Mission 4R

A Soyuz rocket launched Sept. 14, 2001 from Baikonur Cosmodrome, Kazakhstan with the new Pirs Docking Compartment and a crane called the Strela Boom. Pirs docked automatically to the Earth-facing, forward end of the Zvezda Service Module. The Docking Compartment provides an additional egress and ingress location for Russian-based spacewalks and a Soyuz docking port.

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