PLEASE NOTE: EDIT CONTAINS MATERIAL THAT WAS ORIGINALLY 4:3<br/> <br />The mystery of what's happened to Malaysian Airlines missing plane deepens with every passing day.<br/> <br />As the hunt entered its fifth day on Wednesday there was still no hint of where flight MH370 may have gone or why.<br/> <br />The Boeing 777-200 vanished on Saturday with 239 passengers and crew on board representing some 14 nationalities.<br/> <br />John Brennan, director of the CIA in the United States, says nothing can be ruled out at this stage.<br/> <br />(SOUNDBITE)(English) CIA DIRECTOR JOHN BRENNAN SAYING:<br/> <br />"I think there is a lot of speculation right now, some claims of responsibility that have not been confirmed or corroborated at all. We're looking at it very carefully."<br/> <br />At Kuala Lumpur international airport from where the missing plane took off on Saturday travellers said they were thinking of the relatives of those on board.<br/> <br />(SOUNDBITE)(English) PASSENGER, HAIZAM, SAYING:<br/> <br />"It's quite a mystery be
