President Obama speaks to Space Shuttle crew (live)

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US President Barack Obama speaks to the crew of the final Space Shuttle mission STS-135, and to all who are on board the International Space Station. Watch it live.

Update: Obama, who sounds as if he might be chewing a Nicorette gum while on the phone, cracks a LOL when the first astronaut picks up the phone: "Oh, I was just dialing out for pizza and I didn't expect to end up in space."

The rest of the conversation between POTUS and the combined crews of Expedition 28 and STS-135 included ceremonial formalities, appreciations of hard work and extraterrestrial hazards, and potty humor: "I understand you have to share a bathroom. My wife and daughters are always crowding me out. Hopefully you all have a better arrangement up there."

Image above: The STS-135 and Expedition 28 crews gather together in the International Space Station's Kibo module Friday to answer questions from the media around the world. Image credit: NASA TV