>> right. close to 21 tons. >> that's incredible. >> it's a very significant seizure for us, it's a very significant case. >> you found another tunnel smaller than this on november 2nd, so you found two major tunnels in november. >> two in less than 30 days. obviously the work of a major drug cartel. >> most likely you think the sinaloa cartel? >> yeah, from what we've been able to peace together, the intelligence we're getting, the information we've been working on in our investigation, we believe this is the work of the sinaloa cartel. >> they weren't always operating in tijuana, were they? >> no, they've kind of moved in. before we had the arellano felix organization and dea has been working that case and target for a number of years, pretty much dismantling them. but unfortunately the downside of that is now you have another drug cartel that's trying to influence and move into the area. >> do you get the sense that -- there must be other tunnels being dug. do you think there are other tunnels being dug right now? >> that's actually what our tunnel task force does. the minute we find one of these things we're working on the information coming in and trying