President Trump and Homeland Security Secretary Kristi Noem want the U.S.’s southern border wall painted black to keep people from climbing over it.

Noem made the announcement Tuesday as she visited a segment of the wall in New Mexico, even wielding a roller herself. The wall is already high and deep, she said at a press conference while standing in front of it, and soon it will be too hot to handle .

“That is specifically at the request of the president, who understands that in the hot temperatures down here when something is painted black, it gets even warmer , and it will make it even harder for people to climb,” Noem said. “So we are going to be painting the entire southern border wall black to make sure that we encourage individuals to not come into our country illegally.”

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