Arizona city seeks moat to secure Mexico border

“Most plans to gain control of the porous U.S.-Mexico border focus on some combination of fence. But this city in far west Arizona is looking to build a moat.Faced with high-levels of crime and illegal immigration, authorities in Yuma are reaching back to a technique as old as a medieval castle to dig out a “security channel” on a crime-ridden stretch of the border and fill it with water.” (Reuters)