Today at 12:50 CET, ESA astronaut Luca Parmitano and NASA astronaut Andrew Morgan will bring the new AMS cooling pump system out of the airlock and install it. This Spacewalk is the 3rd in a series devoted to service the AMS detector and the most important one for AMS scientists based at CERN in the AMS POCC (Payload and Operations Control Centre), in particular lead UTTPS lead engineer Zhan Zhang, who will work in tandem with the astronauts to power the system off and then on again once it is installed by Parmitano. The ESA astronaut will then make the 8 connections from the UTTPS to the existing tubes he cut open during EVA #2. This will take the rest of EVA #3, which will conclude at 20:30 CET. AMS is a unique cosmic ray detector, the the only magnet in space, taking data on the ISS since 2011. CERN will go live from the POCC with commentary during the crucial stages of the spacewalk and AMS scientists Andrei Kounine, deputy spokesperson, Mercedes Paniccia (University of Geneva) and Giovanni Ambrosi (INFN Perugia) will explain the action and answer questions on AMS science. Follow the live from CERN on YT and ask your questions using #SpaceWalkforAMS .