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'The Fence,' a documentary, airs tonight


What promises to be an interesting documentary on the most recent construction forming part of the U.S.-Mexico border fence screens tonight on HBO at 8 p.m. Pacific. From the synopsis for "The Fence" provided by HBO:

In Oct. 2006, the U.S. government decided to build a 700-mile fence along its troubled 2000-mile-plus 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?

The expense involved in building border fencing has been mind-boggling: One particular stretch of fence completed last year between San Diego and Tijuana, which required the filling in of a steep canyon with 1.5 million cubic yards of dirt, cost $48.6?million.

It was part of a $59?million contract to complete about 3½ miles of fence in the area altogether, authorized prior the Secure Fence Act (which covered the 700 miles).

That's more than $8.4 million per half mile, one pricey stretch of fence.