Three Russian cosmonauts boarded the International Space Station March 18 after docking their Soyuz MS-21 spacecraft a little more than three hours after launching from the Baikonur Cosmodrome in Kazakhstan. Oleg Artemyev, Denis Matveev and Sergey Korsakov docked the Soyuz to the Prichal module on the ISS for the start of a planned six-month mission and were later greeted by members of the Expedition 66 crew.