Grinning passenger poses for a SELFIE alongside hijacker wearing a 'suicide vest': Jet is forced to land in Cyprus where hostage taker gives himself up after demanding officials hand a letter to his ex-wifebr EgyptAir jet hijacked by man in bomb vest from Alexandria to Cairo br Hijacker Seif El Din Mustafa demanded to see Cypriot ex-wifebr Held handful of passengers and crew hostage on tarmac in Cyprusbr Arrested after a five-hour negotiations which saw him leave letter for exbr Cypriot Foreign Ministry said hijacker appeared to be 'mentally unstable' br Are you the man taking the selfie with the hijacker? Do you know him?