Stock Photo - ABOARD THE INTERNATIONAL SPACE STATION -- 22 May 2013 -- NASA astronaut Chris Cassidy - Expedition 36 flight engineer, works on the Capillary Flow Experiment aboard the International Space Station -- Picture by Lightroom Photos/NASA.

Stock Photo: ABOARD THE INTERNATIONAL SPACE STATION -- 22 May 2013 -- NASA astronaut Chris Cassidy - Expedition 36 flight engineer, works on the Capillary Flow Experiment.