Boeing lifts 20-year industry demand forecast to $6.8 trillion

LE BOURGET, France (Reuters) - Boeing Co raised its rolling 20-year industry forecast for passenger aircraft by 3% on Monday, fuelled by strong air traffic predictions, though global geopolitical and economic risks could upset the rosy outlook.The world's largest planemaker said at the Paris Airshow it expected 44,040 new airplane deliveries over the next two decades, up from the roughly 43,000 it forecast a year ago.That would be worth $6.8 trillion (5.4 trillion pounds) over the next two..