Nine years ago today, Kuala Lumpur airport was experiencing a typically hectic day, with commuters and holidaymakers passing through the Malaysian capital. Blending in amongst fellow travellers was a middle-aged North Korean man dressed in casual clothing - a blue polo shirt and jeans - who was wandering around the budget airlines terminal, awaiting his flight back home to Macau. Kim Chol was the alias of Kim Jong-nam - the estranged half-brother of Kim Jong-un, and the one who was initially