Former pilot and aviation specialist Terry Tozer explains to NDTV how Captain Smit may have managed to escape the cockpit during the Flydubai emergency. Tozer says the captain would have faced an extremely difficult situation while the aircraft was in a nose-down attitude, describing his effort as heroic. He also discusses the use of emergency transponder codes and why such codes were originally designed to discreetly alert air traffic control to a hijacking.