that's what malaysia flight officials are saying, and that detail adds a big working detail to the figure of somebody with a triple 777 design being responsible for whatever happened to flight 370. because that theory had authorities looking at both pilots, but now their boss says these pilots did not request to fly together. that obviously does not rule them out, but it is a piece of the puzzle we had not seen before. one of the pilots does have a fancy flight simulator in his house, but so far authorities have not revealed what he was using it to practice for and the pilot's pals are suggesting now that he just really likes to fly. and for others on board, we heard this morning that background checks for some passengers still have not come back yet. this morning we are also told that right now the three most likely causes for flight 370's disappearance are hijacking, sabotage or personal problems among whoever was at the controls.