Already at various border crossing points, customs authorities are having people who appear sick taken to a secondary inspection area for further evaluation.

CNN: Commentary: Flu shouldn't close Mexico border

Nationalist politicians warier of cross-community amity warn that just a few violent incidents caused by the settling of old scores could ruin this budding Greek-Turkish friendship and close the border crossing points again.

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On the Mexican border, crossing points in El Paso, Texas, and San Ysidro, California, handled a third of the traffic.

CNN: U.S. tracks heaviest border-crossing points

The busiest crossing points along the Canadian border were in the Buffalo, New York-Niagara area and Detroit.

CNN: U.S. tracks heaviest border-crossing points

Their community awareness camps educate families in rural villages and city slums about the dangers of sex trafficking, and a daily patrol at crossing points along the India-Nepal border successfully rescues an average of four Nepali girls a day.

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The Zetas, who are estimated to have more than ten thousand fighters, control virtually the entire east coast of Mexico, and have laid claim to several of the busiest cargo crossing points on the U.S. border, including Matamoros, Reynosa, and Nuevo Laredo.

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