This week's Question: Spanish designer Oscar Vinals recently developed a triple-decker aircraft design. The zero-emission AWWA-QG Progress Eagle would be powered by six hydrogen engines, a wind turbine, and solar panels. Vinals envisions that the plane would be able to take to the skies by 2030. Among the challenges would be finding runways long enough to allow such a large plane to land and take off. What do you think? Will triple-decker planes take flight by 2030?