Airbus Chief Executive Tom Enders speaks during a panel discussion on "Driving Change, Overcoming Challenges" during the Singapore Airshow Aviation Leadership Summit at the Raffles City Convention ... more 
Airbus Chief Executive Tom Enders speaks during a panel discussion on "Driving Change, Overcoming Challenges" during the Singapore Airshow Aviation Leadership Summit at the Raffles City Convention Centre, Monday, Feb. 13, 2012. Enders said Monday he's concerned that new European Union carbon emission charges for airlines could spark a trade war between Europe and the rest of the world. (AP Photo / Bryan van der Beek) less 
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Associated Press
Mon, Feb 13, 2012 6:01 AM EST