NASA astronaut Chris Cassidy (left), Russian cosmonaut Alexander Misurkin, NASA astronaut Karen Nyberg and European Space Agency astronaut Luca Parmitano (right), all Expedition 36 flight engineers, pose for a portrait in their "Penguin" suits in the Zvezda Service Module of the International Space Station. Also sent as Twitter message.

ISS036-E-048237 (9 Sept. 2013) --- Expedition 35/36 and Expedition 36/37 crew members pose for a group portrait in the International Space Station’s Destiny laboratory following the ceremony of changing-of-command from Expedition 36 to Expedition 37. Pictured on the front row (from the left) are NASA astronaut Chris Cassidy, Expedition 36 flight engineer; Russian cosmonaut Pavel Vinogradov, Expedition 36 commander; and Russian cosmonaut Fyodor Yurchikhin, Expedition 37 commander. Pictured on the back row (from the left) are Russian cosmonaut Alexander Misurkin, Expedition 36 flight engineer; European Space Agency astronaut Luca Parmitano and NASA astronaut Karen Nyberg, both Expedition 37 flight engineers.

ISS036-E-032944 (15 Aug. 2013) --- NASA astronaut Chris Cassidy (left), Russian cosmonaut Alexander Misurkin, NASA astronaut Karen Nyberg and European Space Agency astronaut Luca Parmitano (right), all Expedition 36 flight engineers, pose for a portrait in the Zvezda Service Module of the International Space Station.