Back a long time ago when hair transplants were first being done one of the procedures was called scalp flap surgery. What they did is remove a piece of scalp from the side of the head, and move the hair to where the hairline would be. It was used only for receeding hairlines. The problem with it was it made the scalp look very red, and it gave you hair a very unnatural look since the hair on the side of your head grows in a different direction than the top, front, or back. Most of those people have to do funny combovers to hold things together just like Donald Trump. If you see anyone like donald trump who has to do a tripple combover, then its pretty clear they had scalp flap surgery. Today they do whats called follicular unit micrografts which makes hair transplants almost undetectable and gives the hair a much better natural look. Hair transplant surgeons have been using this technique since the 1990's