WASHINGTON — Homeland Security Secretary Kristi Noem said Tuesday that the entire border wall along the southern border with Mexico is going to be painted black to make it hotter and deter illegal immigration — and she credited President Trump with the idea.

U.S. Homeland Security Secretary Kristi Noem said the nation's southern border walls will be painted black to better repel anyone who might try to scale them.

Speaking in front of a portion of the southern border wall in Santa Teresa, New Mexico, Noem explained that the wall would be painted entirely black for the dual purposes of making it heat up more and thus harder to climb, as well as increasing the lifespan of the metal.