methods of smuggling marijuana into the USA from Mexico

some have tried the home made go-cart with trailer method above (Reuters/U.S. Customs and Border Protection)

others went with the home made cannon method below, Feb 26 2013 (AP Photo/Mexicali Public Safety Department)

and my favorite is the "just drive over the fence" method

all from a photo gallery on the border problem: http://pixtale.net/2013/05/on-the-border/