Book excerpt: The border between the United States and Mexico isn't just a boundary between nations; it's a chasm that separates a wealthy global superpower from a poverty-stricken Third World Country. To millions of Mexicans desperate for a better life, it's a finish line-to cross it undetected means to seek prosperity in America. In 1844 the United States annexed Texas and over the next few years took most of the current Southwest United States. Today, the Mexican people south-of-the-border see the benefits of life in the good-old U.S. of A. and according to polls, they're willing to finish things up and give us the rest. Columnist Erik Rush proposes that we take them up on the offer. Erik Rush say, '40% of Mexicans claim that they would move here if they could. Let's save them the effort and bring the U.S. to them.'