The Minuteman Civil Defense Corps, which posted hundreds of civilian volunteers along the U.S.-Mexico border over the past five years, has disbanded, citing what it called "rising aggression" in the country and decisions by lawmakers in Washington who have "pushed amnesty down our throats." "The mental attitude of many Americans is turning meaner … and we are concerned that this could cause problems," MCDC President Carmen Mercer told The Washington Times on Monday. "You see aggression surfacing even at the tea party marches. We just did not want to deal with the liability anymore. "We have to protect the ranchers...