This file photo taken on June 1, 2016 shows the prototype of the 3D printed plane THOR aircraft pictured at the boot of Airbus at the International Aerospace Exhibition (ILA) in Schoenefeld near Berlin, on June 01, 2016. Dwarfed by huge jets all around, the mini-plane Thor was nonetheless an eye-catcher at the Berlin air show this week -- the small Airbus marvel is the world's first 3D-printed aircraft. (Photo/Agencies)
