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Astronauts. they said when they went past the north pole that santa was still loading his sleigh. they're a little concerned because it looks like he's got so many toys that he might have a little difficulty launching but all the reindeer are in good shame. when he launches and heads this way we'll let you know. >> i'm sure he gave the astronauts a thumbs up there as well and then so did the ast nauts, right? >> that's right, richard. >> that's the protocol up in space nowadays. so, they need this cooling pump so they can get delivery of supplies. right? they're not going to allow supplies to ...

Worried about astronauts that are up there, the americans and the italians who are supposed to spacewalk but can't, it's a catch-22. >> it is sort of a catch-22. the problem is there's a faulty flow control valve that's making it tough for the astronauts to control the level of heating and cooling actually on board space station. the good thing is there are actually two coolant loops. one is faulty. another one can be used. it's just that they can't use all the components on board international space station at full capacity because they're generating too much heat. it's really important that ...

Investigating a horrific crash that killed two teenage boys and seriously injured eight others. the group of teens was riding in an suv when it collided with another car. several teens were thrown from that suv after it rolled over. the injured range in age from 13 to 16. two adults in the other car were not hurt. two astronauts are attempting a seven-hour space walk this morning to make a crucial repair of the international space station. aims to fix a broken cooling pump that failed last weekend. let's get right to nbc's jay barbary. how tough a challenge is this? >> well, i'll tell you, i...