Crew back on Earth after almost one year in space

Long stay in space studies physical effects on human body and a manned Mars mission

US astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko returned to Earth on Wednesday after spending almost a year in space in a groundbreaking experiment foreshadowing a potential manned mission to Mars.

"We have landing," Russian Mission Control confirmed after the trio touched down southeast of the settlement of Dzhezkazgan in central Kazakhstan.