NASA astronaut Peggy Whitson is seen during the 200th spacewalk in support of the International Space Station on May 12, 2017. Expedition 51 Commander Peggy Whitson and Flight Engineer Jac, k Fischer of NASA successfully replaced a large avionics box that supplies electricity and data connections to the science experiments. The astronauts also completed additional tasks to install a connector that will route data to the Alpha Magnetic Spectrometer, repair insulation at the connecting point of the Japanese robotic arm, and install a protective shield on the Pressurized Mating Adapter-3. This adapter will host a new international docking port for the arrival of commercial crew spacecraft. (Photo by NASA)
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