U.S. Secretary of State, John Kerry, right, meets with NASA astronaut Scott Kelly, center, and Russian cosmonaut Mikhail Kornienko of Roscosmos, left, to discuss their year aboard the International Space Station, Thursday, March 24, 2016, in Moscow, Russia. Kelly and Kornienko's year long mission is providing valuable data about how the human body adjusts to weightlessness and long-duration spaceflight, which will inform future human missions on the journey to Mars.