NASA astronaut Peggy Whitson floating through the Unity module aboard the International Space Station (ISS) during the Expedition 50 mission in this photo taken on November 28, 2016. Whitson officially sets the U.S. record today for most cumulative days in space, surpassing NASA astronaut Jeff Williams’ record of 534 days. Additionally, she is the first woman to command the space station twice, and holds the record for most spacewalks conducted by a female astronaut. Credit: NASA #NASA #PeggyWhitson #NASAWomen