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.

Homeland Security Secretary Kristi Noem said the entire southern border wall will be painted black, so it will get hot in the sun and "make it even harder for people to climb."

U.S. Border Patrol Chief Mike Banks, who attended the event with Noem, said the paint would also help deter rust.