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New procedures are in place for border patrol agents along the US-Mexico border try to stem the tide of guns and money making their way south and ending up in the hands of violent drug cartels.
As cars and trucks leave the U.S. and head into Mexico there's a traffic jam where there's usually not one.
Albert Ross, who's crossing the border into Mexico, said "I usually just drive straight through, no questions asked. This is the first time this has ever happened."
US Customs and Border Protection and ICE officers have always checked cars and people coming into the us. Now they're checking people who are heading out.
David Higgerson, of the US Customs and Border Protection, said "it was always considered to be not really our problem. But it is our problem. But it is our problem with the cartels and everything go on. It is incumbent on us to take a very active role in that."
With K-9s and high tech gadgets they're looking for large loads of cash and guns, hoping to cut off the supply lines for the cartels.
Inside this trailer, an X-ray machine scans cars and trucks that are lined up to go into Mexico.
A photo provided to us by customs and border protection shows us how it caught drugs in a semi.
David Higgerson said "you can do a lot of cars quickly. And only concentrate on cars where you see anomalies, which is important because you can get everyone else out of there and going south to do their business."
Those who cross the border say they have nothing to hide and hope this crackdown will bring down gun and cash smuggling.
Fred Gross, who's also headed to Mexico toady, said "makes me feel a little bit safer. I come over here and work everyday. It can get scary at times."
Customs and Border Protection says the southbound ports need to be updated because they were never really designed to do checks.
