April 19 (UPI) -- NASA astronaut Don Pettit will return to Earth from the International Space Station Saturday, alongside his two Russian cosmonaut colleagues. Pettit, Alexey Ovchinin and Ivan Vagner are expected to land outside the town of Dzhezkazgan, Kazakhstan with the help of a parachute at 9:20 p.m. EDT Saturday. The trio will begin the procedure of undocking their Soyuz MS-26 spacecraft from the ISS at 5:57 p.m. EDT. NASA will stream the procedure on its website. Because the landing will