"50 Years Ago, A Fluid Border Made The U.S. 1 Square Mile Smaller : NPR"

 "50 Years Ago, A Fluid Border Made The U.S. 1 Square Mile Smaller : NPR"

http://www.npr.org/2014/09/25/350885341/50-years-ago-a-fluid-border-made-the-u-s-1-square-mile-smaller?utm_medium=RSS&utm_campaign=world