The video below shows an interview in which a Border Patrol official seems to admit that some form of "mass effect" device, aka WMD, was caught being smuggled into the U.S. In a statement, the Department of Homeland Security denies that such an incident ever happened.

Obviously, there are a lot of possibilities here. The DHS could be lying (which wouldn't be surprising). The DHS official could be following orders to try to scare people (see Were terror alerts faked to elect Bush?) If you're on the fringe, maybe the DHS could be planning a false flag operation designed to crack down on civil liberties. Or, maybe the official was just confused.

An unedited version of the video is at peekURL.com/vq5xepC (around 5:50).

Here's the relevant portion of the interview (link) with "Al Hallor, who is the assistant port director and an officer with Customs and Border Protection":

"So, specifically, you're looking for the dirty bomb? You're looking for the nuclear device?" asked [10News investigative reporter Mitch Blacher].

"Correct. Weapons of mass effect," Hallor said.

"You ever found one?" asked Blacher.

"Not at this location," Hallor said.

"But they have found them?" asked Blacher.

"Yes," said Hallor.

"You never found one in San Diego though?" Blacher asked.

"I would say at the port of San Diego we have not," Hallor said.

"Have you found one in San Diego?" Blacher asked.

At that point, a public relations flack who's been shadowing the two of them throughout the interview stops his reply. She says something about having to check whether they've found such devices.

After the interview, the DHS released the following statement. Note that only the first sentence concerns the interview, the rest is just useless verbage:

CBP has not specifically had any incidents with nuclear devices or nuclear materials at our ports of entry. CBP is an all-threats agency. The purpose of many security measures is to prevent threats from ever materializing by being prepared for them. And, we must be prepared to stop threats in whatever form they do materialize at the border, whether it’s an individual or cargo arriving by land, air, or sea. Regardless of what the contraband or threat is, we’re being smart, evaluating, and focusing in on anything or anyone that is potentially high-risk.

We were able to show you first-hand one example of how we evaluate segment risk, inspect, etc. in the cargo environment by air and sea here in San Diego. This is one portion of the CBP mission, and hopefully gives you some examples of how much has evolved in the past decade, with the new technologies we have at our disposal. This, coupled with document requirements at the border, advanced passenger and cargo information, better information sharing, and many other measures help us to secure the border - and each measure doesn’t work individually or in a vacuum, but rather in the layered security that we were able to demonstrate one facet of.