avalanche struck some 50 people at more than 20,000 feet. climbers and guides have been setting routes and preparing rope when the avalanche hit. climbers arrive in april to get used to the altitude before heading toward the 29,000-foot summit. sherpas act as guides for the mostly foreign clients. still to come in the "newsroom," if the wreckage is in the bottom of the ocean, bringing it to surface will be a monumental at that timing. martin savidge has the story from 50 feet below the water's surface. good morning, martin. >> reporter: good morning, carol. we'll show you some of the ways that not only will you have to try to retrieve but maybe even have to cut through debris in order to get at the valuable black boxes they have to have. we'll demonstrate it in a bit. see you then. if you have moderate to severe rheumatoid arthritis, like me,