South Korea's Black Eagles aerobatics team performs an aerial display forming a Ying and Yang logo during the Singapore Airshow at Changi exhibition center in Singapore on February 16, 2016. (Photo by Roslan Rahman/AFP Photo)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles aerobatic team perform the Taegeuk manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles aerobatics team perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles aerobatics team perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





South Korea's Black Eagles aerobatics team perform a manoeuvre during an aerial display on the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





A view of the wingtip of an Airbus A350 XWB aircraft displayed during the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





An Airbus A350 XWB and a Scoot airlines Boeing 787 Dreamliner are displayed during the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





An Airbus A350 XWB aircraft is displayed during the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





A pilot sits in the cockpit of an Airbus A350 XWB aircraft during the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





Aviation enthusiasts crowd around to take photos of an Airbus A350 XWB on display during the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. (Photo by Edgar Su/Reuters)





A U.S. Air Force Boeing C-17 Globemaster sits on display at the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





Spectators watch an aerial display during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





A French Air Force’s Dassault Rafale flies past during an aerial display at the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





An Airbus A350 XWB flies past during an aerial display at the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





A Qatar Airways A380 aircraft sits on display during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





Visitors sit behind a model of PT Dirgantara Indonesia N-219 light transport aircraft at their booth during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





A visitor tries the PT Dirgantara Indonesia N-219 cockpit simulator at their booth during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





Visitors pass models of fighter jets manufactured by China National Aero Technology Import and Export Corporation (CATIC) during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





Visitors sit in a Singapore Technology (ST) Engineering Terrex 2 armoured vehicle during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





Visitors look into a mock up of a luxury cabin interior on display during the Singapore Airshow at Changi Exhibition Center February 17, 2016. (Photo by Edgar Su/Reuters)





Attendees watch an Airbus A350 aircraft manufactured by Airbus SAS perform maneuvers during a flying display at the Singapore Airshow held at the Changi Exhibition Centre in Singapore, on Tuesday, February 16, 2016. Airbus's and Boeings Co.'s 20-year outlooks are dependent on Asia Pacific for new fleet sales, with estimates that 39 percent of their total deliveries will be to that region through 2034. (Photo by SeongJoon Cho/Bloomberg)