US astronaut Tom Marshburn (right), Russian cosmonaut Roman Romanenko (center) and Canadian astronaut Chris Hadfield pose for a picture after leaving the Russian Soyuz space capsule following its landing, some 150 km (90 miles) southeast of the town of Zhezkazgan in central Kazakhstan May 14, 2013. The first Canadian astronaut to command the International Space Station (ISS) landed safely in Kazakhstan with two crewmates on Tuesday, wrapping up a five-month mission aboard the ISS.[Photo/Agencies]