NASA astronaut <a href="https://en.wikipedia.org/wiki/Michael_S._Hopkins" class="extiw" title="en:Michael S. Hopkins">Michael Hopkins</a>, <a href="https://en.wikipedia.org/wiki/Expedition_38" class="extiw" title="en:Expedition 38">Expedition 38</a> flight engineer, works with tanks from the Advanced Recycle Filter Tank Assembly (ARFTA) in the Tranquility node of the International Space Station.
NASA
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