flight without a checked co-pilot supervising him. perhaps they felt comfortable he was with a pilot so seasoned. joining me world news editor for u.s. today, aviation analyst. william, let me start with you again with your reporting that investigators are looking into the captain. you talk about how they are looking into relatives of the captain, trying to get information about his behavior, his state of mind. what are they looking for? i'm also curious about what your sources say why there had been such a delay in terms of interview, for example, the pilot's wife. >> they are trying to get more information out of relatives to determine if there's something there that other people have overlooked that may indicate why this event occurred. farce the wife goes, we're told that they would like to interview her more but at this time they haven't told us why it