If I'm president, I guarantee you they [Mexicans] will pay [for the wall], and they will be very, very happy about it. — Donald Trump Copy Share Image
“A wall is happy when it is well designed, when it rests firmly on its foundation, when its symmetry balances its part and produces no unpleasant stresses. Good design can be worked out on the mathematical principles of mechanics.” — Isaac Asimov Copy Share Image