joining me now is alistair jameson. what's the latest on the investigation? >> within the past couple of hours, investigators say they have located and begun to recover the first of the two black boxes from the wreckage that they will need to find out -- to piece together what happened to this plane. as you said the investigation will focus on why and how it descended so rapidly to where it crashed. clearly a problem on board the aircraft, but the pilots unable to make any kind of distress signal. it is in a very remote area so teams have suspended some of their recovery work until first light tomorrow morning. what we also know is it is particularly tragic because of the number of children on board. two infants and 16 students from this german high school who were on an exchange visit. this school had been organizing exchange visits in spain for the best part of 15 years, and obviously that school in germany feeling most strongly the effects of this tragedy. most of those on board the plane were german or spanish, but authorities in america are working to co