"<strong>March 2:</strong> NASA astronaut Scott Kelly is helped off the Soyuz space capsule after he and two Russian cosmonauts landed in the Kazakhstan desert. Kelly <a href=""http://www.cnn.com/2016/03/01/us/astronaut-scott-kelly-one-year-mission-ending/"" target=""_blank"">spent nearly a year</a> on the International Space Station. <a href=""http://www.cnn.com/2015/12/15/us/gallery/scott-kelly-space-photos-astronaut/index.html"" target=""_blank"">See his best photos from space</a>"