President Bush's planned deployment of National Guard troops to the Mexican border would last at least two years with no clear end date, according to a Pentagon memo obtained Friday by The Associated Press. The one-page "initial guidance" memo to National Guard leaders in border states does not address the estimated cost of the mission or when soldiers would be deployed. But high-ranking officials in the California National Guard said they were told Friday that deployments would not begin before early June. While the military document makes clear the troops would remain under the command of their governors, it also...