Stock Photo - Russian cosmonaut Oleg Kononenko, Expedition 30 flight engineer, performs removal and replacement of the KVD Pressure Equalization Valve (PEV) in the transfer compartment between the Zarya Functional Cargo Block (FGB) and the Zvezda Service Module of the International Space Station.

Stock Photo: Russian cosmonaut Oleg Kononenko, Expedition 30 flight engineer, performs removal and replacement of the KVD Pressure Equalization Valve (PEV) in the transfer.

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