You people who are causing President Trump grief over his wall need to give him a break. In grade school he heard about this "strong leader" called Qin Shi Huang who had the great wall in China built. This wall protected the Qin Dynasty from the brown horde from inner China.
Of course, he forgot or did not listen to his teachers tell him it was for the period of 221-206 BC. He just knows it is a beautiful wall and you can see it from space just like you can see many of his buildings.