In 2006, the U.S. government decided to build a 700- mile fence along its troubled 2000-mile border with Mexico. Three years, 19 construction companies, 350 engineers, thousands of construction workers, tens of thousands of tons of metal and $3 billion later, was it all worth it? Rory Kennedy, who is the youngest of the eleven children of Robert ‘Bobby’ Kennedy, is no stranger to documentaries and is already an award winning director and producer. ‘The Fence,’ directed and narrated, by Kennedy, will investigate the impact of the project, revealing how its stated goals – containing illegal immigration, cracking down on drug trafficking and protecting America from terrorists- has given way to unforeseen, even absurd consequences when it debuts Thursday, September 16th at 8p only on HBO.