A man works on a security camera which is installed at Tiananmen Square in Beijing.
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Nasa astronaut Chris Cassidy, an Expedition 36 flight engineer, uses a 400mm lens on a digital still camera to photograph a target of opportunity on Earth, some 250 miles below him from inside the “Cupola” of the International Space Station. Mr Cassidy has been aboard the orbital outpost since late March and will stay until September, Nasa said. The Cupola, a dome-shaped module with windows, was launched and installed as a panoramic control tower for operations outside of the ISS in 2010.