Where did you see that? I saw an article where they said walls don’t work or something today, is that what you’re referring to?

Edit, found this:

In the Oval Office on Thursday, Biden made clear that he was moving forward with wall construction grudgingly, in order to comply with funds appropriated by Congress in 2019. He said he had tried and failed to get Congress to redirect the funding it had allocated for wall construction in south Texas. “The money was appropriated for the border wall. I tried to get them to reappropriate, to redirect that money. They didn’t. They wouldn’t. In the meantime, there’s nothing under the law other than they have to use the money for what it was appropriated for. I can’t stop that,” he said.