Expedition 34/35 prime crew members from left: Flight Engineer Tom Marshburn of NASA, Soyuz Commander Roman Romanenko, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), and backup crew members NASA astronaut Karen Nyber, Russian cosmonaut Fyodor Yurchikin, and European Space Agency astronaut Luca Parmitano pose for a group photograph after the end of a press conference held at the Cosmonaut Hotel, on Tuesday, December 18, 2012, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 34/35 prime crew members from left: Flight Engineer Tom Marshburn of NASA, Soyuz Commander Roman Romanenko, Flight Engineer Chris Hadfield of the Canadian Space Agency (CSA), and backup crew members NASA astronaut Karen Nyber, Russian cosmonaut Fyodor Yurchikin, and European Space Agency astronaut Luca Parmitano are seen during a press conference held at the Cosmonaut Hotel, on Tuesday, December 18, 2012, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Photo of Astronaut Karen Nyber,Expedition 36 flight engineer,with a snack of peanut butter and chocolate sandwiched between two waffles. Photo taken in the Node 1 module. Also sent as Twitter message.

Russian backup crew member Fyodor Yurchikin, right, answers a reporter's question at a press conference held at the Cosmonaut Hotel, on Tuesday, Dec. 18, 2012, in Baikonur, Kazakhstan. Seen next to him are NASA backup crew member Karen Nyberg and Expedition 34/35 Canadian Space Agency astronaut Chris Hadfield. Photo Credit: (NASA/Carla Cioffi)