Four T-50 fighter jets from the South Korean aerial acrobatic team, the Black Eagles, perform a maneuver during an aerial preview at the Singapore Airshow, 14 February 2016. The fifth edition of the biennial Singapore Airshow will run from 16-21 February 2016 at the Changi Exhibition Centre and showcases over a 1000 aviation and defence exhibitors from 50 different countries. (Photo by Wallace Woon/EPA)
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