Reports of an ammonia leak in the International Space Station’s cooling system sent two astronauts on an unscheduled spacewalk today, which was documented as it happened by Commander Chris Hadfield. Chris Cassidy and Tom Marshburn were charged with heading outside to investigate and replace a 260-pound pump controller box.

The repair mission was streamed live via the Internet as well via helmet-mounted cameras.

  • Clayton Grant

    Fantastic! Can you hear me Dr Tom?

    • Bemani Dog

      Planet Earth is blue, and there is nothing I can do

    • Scott Anderson

      Remember when, before Obama, Americans did this kind of thing?

  • bobcumbers

    Hey… Isn’t that leaky ammonia due to the sequester?

  • Frank Drebin

    Take your protein pills and put your helmet on.

  • $30423294

    I’m floating in a most peculiar wa-ay.

  • dunst43

    By the Bye…Chris Hadfield is Canadian. No charge for this information.

  • dunst43

    By the Bye…Chris Hadfield is Canadian. No charge for this information.