F-100 Super Sabre

Well I do all that already, besides separating stuff. But, there was a cool model, F-100 Super Sabre, I’d like my models to look as streamlined as this, does anyone know how this might have been started, with a cube and they extrude one of the faces and model it like that, or would they have made it by extruding just one vertice at a time? Is there a way to determine that?