if we are doing that and we have the pads and are filling them. the second line of defense would be the snorkels which are really interesting innovation. where they basically took some of the equipment that is found inside the space suit. modified it. basically try to get the other end of the snorkel, the end that is not in the astronaut's mouth down to an area that would not be filled with water. >> as we mentioned, this mission may need three spacewalks with the last one happening on christmas day. what is the most difficult aspect of working in space like this? >> there is a lot of difficult parts about working in space. you are in a micro gravity environment. you are floating. everything is floating. the tools are floating. it's easy to lose them. that is why everything we have is tethered. string and a hook on evening. movement is very laborious. you're inside a self-contained spaceship. you know, a space suit is a

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