The Great Wall of Mexico

Here's an idea. F. Jim Sensenbrenner likes it, so that's good enough for me.

A proposal to build a double set of steel walls with floodlights, surveillance cameras and motion detectors along one-third of the U.S.-Mexican border heads to the Senate next month after winning overwhelming support in the House.

The wall would be intended to prevent illegal immigrants and potential terrorists from hiking across the southern border into the United States. It would run along five segments of the 1,952-mile border that now experience the most illegal crossings.

The plan already has roiled diplomatic relations with Mexico. Leaders in American border communities are saying it will damage local economies and the environment. And immigration experts say that -- at a cost of at least $2.2 billion -- the 700-mile wall would be an expensive boondoggle.

The San Francisco Chronicle has more.