Hong Kong International Airport (HKIA) handled 3.9 million tonnes cargo in 2011, down 4.6 per cent year on year, said a Hong Kong Government statement. In December, air cargo throughput fell 4.3 per cent to 346,000 tonnes year on year, while passenger traffic rose 7.5 per cent to 4.8 million. The airport recorded 29,275 aircraft movements, exceeding the previous record of 28,951 in August 2011 and representing 5.5 per cent…