Which One is Not Like the Others?

While slumming at Pajamas Media, I followed a link to an entry entitled "It Can't Be Done" at a blog called Varifrank. The entry features photos of the ceremonies at the completion of the Transcontinental Railroad, the opening of the Panama Canal, the opening of the US Interstate Highway System, and the launch of Apollo 11 - the first space flight to put men on the moon. Following these photos of events that opened up new vistas and possibilities for man is a photo of a border fence crossing a beach and running into the sea, over the caption, "2006 - Congress declares 'US Border Fence too difficult and expensive to build.'"