A Mexican comes up to the U.S.A. border on his bike with two large bags over his shoulder.
The American Border Patrol stops him and asked the Mexican, "What's in the bags?"
"Sand." replied the Mexican
The border patrol doubted the Mexican and says "We'll just see about that. Get off the bike!"
The American border patrol takes the bags and rips them apart, He empties them out and finds nothing in them but only sand. He dismantle the bike for further inspection thinking that there is illegal substance hiding in the bike. Until he completely destroys the bike but saw nothing. The American border Patrol never gives up and he detain the Mexican and has the sand analyzed, only to discover that there is nothing but 100% pure sand in the bags. he examine the Mexican through x-ray and with the sniffing dog, if the mexican is hiding something to smuggle but nothing found. The American realeses the Mexican , Put the sand into new bags, hefts them onto the Mexican shoulders, gave a new bike, and lets him cross the border .
One week later, The same thing happens. The American patrol ask the Mexican "What have you got?" then the mexican replied "Just Sand." The American raise his eyebrow and does his thorough examination in the bags and the bike. Still he found nothing in the bike and found out that its still sand. and the Mexican is clear again after his body inspection.
The next day , the same thing happen again. Still the American did what his job required him to do. After thorough examination and proving the Mexican got only the sand. He put the sand in a new bag and let the Mexican crosses the border with his bike. This sequence of events is repeated every day for 5 years.
The Mexican doesn't show up one day and the American guard meets him at Ciudad Juarez. Agreed to have a good drink. "Hey, Buddy." says the Guard, Ï have this gut feeling that you are smuggling something. It's driving me crazy. It's all I think about, since the day I first met you. Just between you and me, What are you smuggling ?" The Mexican sips his beer and says " A brand new bags and a Bikes"