I think they're just trying to make it harder for them to reuse. The ones they were talking about had their exit inside of a house on the US side of the border. They're not allowed to go to the Mexico side of the tunnel, so they just destroy what they can and cap it off on the US side.

I think there just trying to make it harder for them to reuse. The ones they were talking about had their exit inside of a house on the US side of the border. They're not allowed to go to the Mexico side of the tunnel, so they just destroy what they can and cap it off on the US side.