An airline pilot has shocked his fiancee by proposing to her shortly before takeoff via his cockpit's passenger announcement system. https://filedn.eu/lhVNGNsizwl5t7THnzzJ2c8/CEN-AirProposal-01.mp4 In a video posted on social media, Ibrahim El Khatib - of Lebanese aviation enterprise Middle East Airlines - can be seen picking up the microphone…