Russian Elektron-VM BZh Liquid Unit Replacement

ISS028-E-014908 (8 July 2011) --- Russian cosmonauts Andrey Borisenko (left), Expedition 28 commander; Alexander Samokutyaev (center) and Sergei Volkov, both flight engineers, are pictured with Russian Elektron oxygen generator systems in the Zvezda Service Module of the International Space Station.