This Week @NASA: “534 days and counting …” President Trump and astronaut Kate Rubins congratulated Peggy Whitson for breaking the record for time spent in space by a U.S. astronaut. Our Cassini spacecraft began its final mission–the Grand Finale. The Space Station crew discussed scientific research and filmmaking at the first 4K downlink from space with the National Association of Broadcasters and more! Watch: http://go.nasa.gov/2pu2J9g[fb_vid id=”10155148816131772″]