In a nationally televised speech last night President Bush announced plans to deploy the military on the US-Mexico border. It is natural that the people of Mexico would be concerned about such plans. Usually when one country masses it troops on its border with another country it is a provocative act, signally aggressive, hostile intentions. Mexican president Vicente Fox sought to reassure the Mexican people, telling them that this was a logistical and administrative effort, rather than a military one.
I guess I would call it a psychological maneuver rather than one actually intended or likely to accomplish anything. Over the last 20 years or so the US has continually beefed up security on the border without slowing down illegal immigration in the slightest. The only effect of increasing security at the places where the most people were crossing has been to force the illegals to cross elsewhere.
Hopefully our national guard troops will understand their role and not actually do anything of a military nature while stationed on the border. The only people they will be encountering on the border are civilians (all the terrorists who enter our country by driving across the border invariably pick the more lightly defended Canadian border) and if they act in a military rather than a symbolic manner someone may get hurt.