iss043e181041 (May 8, 2015) --- European Space Agency (ESA) astronaut Samantha Christoforetti prepares the TripleLux-A experiment for return on SpaceX's Dragon cargo craft. The TripleLux-A experiment studies the effects of the spaceflight conditions on immune suppresion in mice, which will help scientists understand the effects of radiation and microgravity on the human immune system in space.