Given the sophistication of this tunnel, it's clear that the people responsible have significant resources at their disposal.

Whether they are designed to smuggle drugs, people, weapons or other contraband, these tunnels pose a threat to our nation's security.

They have reached a level of organization and sophistication that we have not seen previously. They have become incredibly savvy.

This one is just absolutely amazing. It's just huge. It really looks like a professionally done mine shaft.

It was like being in a cavern or a cave.

It's not so much about a French theme. It was to give the casino an air of sophistication.