Plane Author: Gilbert Sopakuwa Lisense: CC by-nc-nd 2.0 https://flic.kr/p/2jdQ9xt Engine Author: 防衛省 Lisense: CC BY 4.0 https://commons.wikimedia.org/wiki/File:IHI_F7_engine_for_test.png#/media/File:IHI_F7_engine_for_test.png Wind Turbine Author: Lance Cheung Lisense: CC BY 4.0 https://flic.kr/p/6EyAxP Train from under Author: K.H.Reichert Lisense: CC by-nc 2.0 https://flic.kr/p/xAZGKT