In Plane Sight. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3297308/free-photo-image-airplane-building-aircraft-animalFree Image from public domain licenseCol. Doherty, Officers and Men. 13th Light Dragoons. by Roger Fenton https://www.rawpixel.com/image/14248004/col-doherty-officers-and-men-13th-light-dragoons-roger-fentonFree Image from public domain license