sherpa guides reportedly walked off the job today after the deaths of 16 of their colleagues in last week's avalanche. the american climber on the left witnessed the disaster and said his sherpa on the right saved his life. >> when the avalanche came down, it was -- it was a bit overwhelming. and a lot of thoughts go through your head quickly. but the sherpa is so used to this situation. and they have been up through that ice fall so many times he just quickly, you know, he just quickly started yelling get down, get down and just kind of pushed me behind the large block of ice. pretty amazing the climber was not hurt. and this was tweeted, it shows the outside of the international space station space station today. he and another astronaut replaced the backup computer.