been a day of surprising revelations and the biggest surprise adds weight to thert r thertheo thertheory, someone intentionally turned the plane off of the course. it was the signal -- if this was the signal from the missing jet, it's dramatic proof the plane turned left heading back across the peninsula and west toward the indian ocean. also a law enforcement official tells cnn the westward turn almost certainly, in quotes, with almost certainly was programmed into the plane's on. board computer by someone in the cockpit. another important development, the search of both pilot's e-mail and computer so far has turned up nothing suspicious, they korgd to u.s. officials who have been briefed by the malaysians. our correspondents and analysts